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Boulder

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Sightings

Updated ~20 hr(s) ago.
Last seen First seen High counts

Observations - Last seen - Sorted by Date descending

species 1.

Osprey

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 2.

Western Kingbird

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 3.

Common Raven

Count  4
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 4.

House Wren

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 5.

European Starling

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 6.

Gray Catbird

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 7.

House Finch

Count  2
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 8.

American Goldfinch

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 9.

Lark Sparrow

Count  3
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 10.

Vesper Sparrow

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 11.

Spotted Towhee

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 12.

Yellow-breasted Chat

Count  2
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 13.

Western Meadowlark

Count  3
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 14.

Bullock's Oriole

Count  1
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 15.

Red-winged Blackbird

Count  3
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 16.

Brown-headed Cowbird

Count  4
8 Jun 2023
Thomas Heinrich
Boulder Open Space--Beech Trail
species 17.

Canada Goose

Count  10
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 18.

Mallard

Count  17
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 19.

Pied-billed Grebe

Count  1
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 20.

Eurasian Collared-Dove

Count  2
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 21.

Spotted Sandpiper

Count  1
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 22.

Double-crested Cormorant

Count  2
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 23.

Say's Phoebe

Count  1
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 24.

Barn Swallow

Count  3
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 25.

American Robin

Count  1
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 26.

House Sparrow

Count  8
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 27.

Common Grackle

Count  8
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 28.

Common Yellowthroat

Count  1
8 Jun 2023
Brody Guisness
Hodgson-Harris Reservoir
species 29.

Ruddy Duck

Count  4
8 Jun 2023
Thomas Heinrich
Wonderland Lake Park
species 30.

Mourning Dove

Count  1
8 Jun 2023
Thomas Heinrich
Wonderland Lake Park
species 31.

American White Pelican

Count  1
8 Jun 2023
Thomas Heinrich
Wonderland Lake Park
species 32.

Tree Swallow

Count  3
8 Jun 2023
Thomas Heinrich
Wonderland Lake Park
species 33.

Song Sparrow

Count  1
8 Jun 2023
Thomas Heinrich
Wonderland Lake Park
species 34.

Broad-tailed Hummingbird

Count  1
8 Jun 2023
Pamela S
Riverside
species 35.

Cordilleran Flycatcher

Count  1
8 Jun 2023
Pamela S
Riverside
species 36.

Steller's Jay

Count  1
8 Jun 2023
Pamela S
Riverside
species 37.

American Crow

Count  1
8 Jun 2023
Pamela S
Riverside
species 38.

Western Grebe

Count  1
7 Jun 2023
Ariana Saraha
Izaak Walton Park
species 39.

Great Blue Heron

Count  1
7 Jun 2023
Ariana Saraha
Izaak Walton Park
species 40.

Black-crowned Night-Heron

Count  1
7 Jun 2023
Ariana Saraha
Izaak Walton Park
species 41.

Chimney Swift

Count  1
7 Jun 2023
Thomas Heinrich
3rd & Forest
species 42.

Northern Flicker

Count  1
7 Jun 2023
Thomas Heinrich
3rd & Forest
species 43.

Black-billed Magpie

Count  2
7 Jun 2023
Thomas Heinrich
3rd & Forest
species 44.

Violet-green Swallow

Count  75
7 Jun 2023
Thomas Heinrich
3rd & Forest
species 45.

Blue Jay

Count  3
7 Jun 2023
anne anderson
10386 N65 th Longmont
species 46.

Black-capped Chickadee

Count  2
7 Jun 2023
anne anderson
10386 N65 th Longmont
species 47.

Cooper's Hawk

Count  1
7 Jun 2023
Matt Cahill
1441 Pearl Street, Boulder, Colorado, US (40.019, -105.276)
species 48.

Turkey Vulture

Count  1
7 Jun 2023
Eva Matthews Lark
Foothills Community Hospital #325, Boulder US-CO 40.01624, -105.23636
species 49.

Black-chinned Hummingbird

Count  1
7 Jun 2023
Jim Ward
Waneka Lake/Greenlee Preserve
species 50.

Downy Woodpecker

Count  1
7 Jun 2023
Jim Ward
Waneka Lake/Greenlee Preserve
species 51.

Lesser Goldfinch

Count  1
7 Jun 2023
Jim Ward
Waneka Lake/Greenlee Preserve
species 52.

White-throated Swift

Count  1
7 Jun 2023
Anonymous eBirder
Skunk Canyon Trails
species 53.

Western Wood-Pewee

Count  1
7 Jun 2023
Anonymous eBirder
Skunk Canyon Trails
species 54.

Western Tanager

Count  1
7 Jun 2023
Anonymous eBirder
Skunk Canyon Trails
species 55.

Black-headed Grosbeak

Count  1
7 Jun 2023
Anonymous eBirder
Skunk Canyon Trails
species 56.

Lazuli Bunting

Count  2
7 Jun 2023
Anonymous eBirder
Skunk Canyon Trails
species 57.

Cedar Waxwing

Count  13
7 Jun 2023
Christian Nunes
Home Faith Court
species 58.

Cliff Swallow

Count  35
7 Jun 2023
Susan Ringoen
S 120th St, Lafayette US-CO 39.97913, -105.07145
species 59.

Yellow Warbler

Count  3
7 Jun 2023
Susan Ringoen
S 120th St, Lafayette US-CO 39.97913, -105.07145
species 60.

Red-tailed Hawk

Count  1
7 Jun 2023
Eva Matthews Lark
Foothills Community Hospital #325, Boulder US-CO 40.01624, -105.23636
species 61.

Rock Pigeon

Count  6
7 Jun 2023
Evan Appel
Coal Creek Corridor Open Space
species 62.

White-winged Dove

Count  1
7 Jun 2023
Steven Mlodinow
Longmont, Peregrine Circle
species 63.

Great Egret

Count  2
7 Jun 2023
Diane Birks
Pella Crossing Open Space
species 64.

American Kestrel

Count  1
7 Jun 2023
Diane Birks
Pella Crossing Open Space
species 65.

Eastern Kingbird

Count  1
7 Jun 2023
Diane Birks
Pella Crossing Open Space
species 66.

Killdeer

Count  1
7 Jun 2023
Anonymous eBirder
Lagerman Agricultural Preserve--Lagerman Reservoir
species 67.

Virginia Rail

Count  1
7 Jun 2023
Daniel Gelbart
Marshall Marsh
species 68.

Golden Eagle

Count  1
7 Jun 2023
Daniel Gelbart
Marshall Marsh
species 69.

Belted Kingfisher

Count  1
7 Jun 2023
Daniel Gelbart
Marshall Marsh
species 70.

White-breasted Nuthatch

Count  1
7 Jun 2023
Daniel Gelbart
Marshall Marsh
species 71.

Savannah Sparrow

Count  1
7 Jun 2023
Daniel Gelbart
Marshall Marsh
species 72.

Bushtit

Count  5
7 Jun 2023
Stephen Chang
Emery Backyard
species 73.

Blue-winged Teal

Count  1
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 74.

Cinnamon Teal

Count  1
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 75.

Gadwall

Count  4
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 76.

Green-winged Teal

Count  6
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 77.

Redhead

Count  4
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 78.

Ring-necked Duck

Count  3
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 79.

Eared Grebe

Count  4
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 80.

American Avocet

Count  12
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 81.

Great-tailed Grackle

Count  1
7 Jun 2023
Alexander Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 82.

Hammond's Flycatcher

Count  1
7 Jun 2023
Aleea Pardue
Chautauqua Park
species 83.

Pygmy Nuthatch

Count  1
7 Jun 2023
Aleea Pardue
Chautauqua Park
species 84.

Pine Siskin

Count  1
7 Jun 2023
Aleea Pardue
Chautauqua Park
species 85.

Indigo Bunting

Count  1
7 Jun 2023
Aleea Pardue
Chautauqua Park
species 86.

Warbling Vireo

Count  1
7 Jun 2023
Robert King
Park East
species 87.

Yellow-headed Blackbird

Count  6
7 Jun 2023
Anonymous eBirder
Teller Lake
species 88.

Lincoln's Sparrow

Count  1
7 Jun 2023
Pamela S
Riverside
species 89.

Wild Turkey

Count  9
7 Jun 2023
Alexander Brown
Heil Valley Ranch
species 90.

Wood Duck

Count  7
7 Jun 2023
Grant Wiest
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 91.

Bald Eagle

Count  2
7 Jun 2023
Grant Wiest
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 92.

Woodhouse's Scrub-Jay

Count  1
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 93.

Mountain Chickadee

Count  1
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 94.

Red-breasted Nuthatch

Count  1
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 95.

Blue-gray Gnatcatcher

Count  2
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 96.

Green-tailed Towhee

Count  1
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 97.

Ovenbird

Count  1
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 98.

Virginia's Warbler

Count  6
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 99.

MacGillivray's Warbler

Count  1
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 100.

American Redstart

Count  1
7 Jun 2023
Owen Robertson
Skunk Canyon Trails
species 101.

Hairy Woodpecker

Count  1
7 Jun 2023
Taryn Roloff
240 30th St, Boulder US-CO 39.99517, -105.25672
species 102.

Chipping Sparrow

Count  2
7 Jun 2023
Ben Sandstrom
Eldorado Canyon SP
species 103.

Plumbeous Vireo

Count  2
7 Jun 2023
Sandra Hardy Reigel
Boulder Mountain Park--Shanahan Mesa
species 104.

Western Bluebird

Count  1
7 Jun 2023
Sandra Hardy Reigel
Boulder Mountain Park--Shanahan Mesa
species 105.

Snowy Egret

Count  2
7 Jun 2023
Susan Downey
580 Old Laramie Trail East, Lafayette, Colorado, US (39.981, -105.096)
species 106.

Great Horned Owl

Count  1
7 Jun 2023
Susan Downey
Lafayette, Colorado, US (39.98, -105.091)
species 107.

Swainson's Hawk

Count  1
7 Jun 2023
Thomas Heinrich
Waneka Lake/Greenlee Preserve
species 108.

Rock Wren

Count  2
7 Jun 2023
Anonymous eBirder
Hall Ranch
species 109.

Northern Mockingbird

Count  1
7 Jun 2023
Anonymous eBirder
Hall Ranch
species 110.

Mountain Bluebird

Count  1
7 Jun 2023
Anonymous eBirder
Hall Ranch
species 111.

Dark-eyed Junco

Count  2
7 Jun 2023
Anonymous eBirder
Hall Ranch
species 112.

Williamson's Sapsucker

Count  1
7 Jun 2023
Michelle Miller
80466, Nederland US-CO (39.9589,-105.4441)
species 113.

Ruby-crowned Kinglet

Count  5
7 Jun 2023
Michelle Miller
80466, Nederland US-CO (39.9589,-105.4441)
species 114.

Townsend's Solitaire

Count  1
7 Jun 2023
Michelle Miller
80466, Nederland US-CO (39.9589,-105.4441)
species 115.

Hermit Thrush

Count  2
7 Jun 2023
Michelle Miller
80466, Nederland US-CO (39.9589,-105.4441)
species 116.

Red Crossbill

Count  1
7 Jun 2023
Michelle Miller
80466, Nederland US-CO (39.9589,-105.4441)
species 117.

Yellow-rumped Warbler

Count  1
7 Jun 2023
Michelle Miller
80466, Nederland US-CO (39.9589,-105.4441)
species 118.

Pine Grosbeak

Count  X
7 Jun 2023
Michael O’Sullivan
Greenwood Drive Niwot
species 119.

Bobolink

Count  3
7 Jun 2023
Thomas Heinrich
East Boulder Trail--Teller Lakes
species 120.

Clark's Nutcracker

Count  1
7 Jun 2023
Patrick Morgan
Brainard Lake Road Gate
species 121.

Brown Creeper

Count  1
7 Jun 2023
Patrick Morgan
Brainard Lake Road Gate
species 122.

Blue Grosbeak

Count  X
7 Jun 2023
carl starace
Rabbit Mountain
species 123.

Wilson's Warbler

Count  2
7 Jun 2023
Bird Conservancy
CU Mountain Research Station
species 124.

Brewer's Blackbird

Count  7
7 Jun 2023
Peter Ruprecht
Skunk Canyon Trails
species 125.

Cassin's Finch

Count  1
7 Jun 2023
Peter Ruprecht
National Center for Atmospheric Research Mesa
species 126.

Swainson's Thrush

Count  1
7 Jun 2023
Daniel Maynard
Gregory Canyon
species 127.

Horned Lark

Count  1
7 Jun 2023
Thomas Heinrich
Gunbarrel Hill
species 128.

Grasshopper Sparrow

Count  1
7 Jun 2023
Thomas Heinrich
Gunbarrel Hill
species 129.

Common Nighthawk

Count  1
7 Jun 2023
Dan Zmolek
Twin Lakes (Boulder County)
species 130.

Common Poorwill

Count  2
6 Jun 2023
Rob Cassady
National Center for Atmospheric Research Mesa
species 131.

Peregrine Falcon

Count  1
6 Jun 2023
Stephanie Vaughan
Walden Ponds Wildlife Habitat--Cottonwood Marsh/Wally Tove's Pond/Duck Pond
species 132.

Northern Shoveler

Count  2
6 Jun 2023
Anonymous eBirder
McIntosh Lake
species 133.

Rose-breasted Grosbeak

Count  1
6 Jun 2023
Joo Tan
Bear Canyon Trail
species 134.

American Dipper

Count  2
6 Jun 2023
Casey Menick 🦤
Walker Ranch Loop
species 135.

Canada Jay

Count  2
6 Jun 2023
Joe McDonnell
Brainard Lake Road Gate
species 136.

Eastern Phoebe

Count  1
6 Jun 2023
David Dowell
Golden Ponds Park and Nature Area
species 137.

Wilson's Snipe

Count  1
6 Jun 2023
Eileen Rutherford
City of Boulder OSMP--Cherryvale Office area
species 138.

Northern Rough-winged Swallow

Count  1
6 Jun 2023
Charles Hundertmark
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 139.

Marsh Wren

Count  1
6 Jun 2023
Charles Hundertmark
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 140.

Dusky Flycatcher

Count  1
6 Jun 2023
Dave Hallock
Mud Lake Open Space
species 141.

Red-eyed Vireo

Count  1
6 Jun 2023
Bob Spencer
Valmont east of 61st
species 142.

Bank Swallow

Count  6
6 Jun 2023
Ted Floyd
Waneka Lake/Greenlee Preserve
species 143.

American Three-toed Woodpecker

Count  1
6 Jun 2023
Holden Maxfield
Brainard Lake Recreation Area
species 144.

Fox Sparrow

Count  1
6 Jun 2023
Holden Maxfield
Brainard Lake Recreation Area
species 145.

White-crowned Sparrow

Count  3
6 Jun 2023
Holden Maxfield
Brainard Lake Recreation Area
species 146.

Common Merganser

Count  5
5 Jun 2023
Eve Lempriere
Old Saint Vrain Rd
species 147.

Clark's Grebe

Count  1
5 Jun 2023
Eric DeFonso 🦑
Valmont Overlook (Legion Park)
species 148.

American Coot

Count  1
5 Jun 2023
Carrie Vaughn
Pella Crossing Open Space
species 149.

Broad-winged Hawk

Count  1
5 Jun 2023
Bennett Baynham
Gregory Canyon
species 150.

Olive-sided Flycatcher

Count  1
5 Jun 2023
Dave Hallock
CR 103
species 151.

Orchard Oriole

Count  1
5 Jun 2023
Jim Ward
White Rocks Trail area
species 152.

American Bittern

Count  1
5 Jun 2023
Joo Tan
Boulder Reservoir complex--Coot Lake
species 153.

Band-tailed Pigeon

Count  17
5 Jun 2023
Robin Allison
124 Ski Road
species 154.

Flammulated Owl

Count  2
5 Jun 2023
Thomas Heinrich
Green Mountain West Ridge Trail
species 155.

Eastern Screech-Owl

Count  1
4 Jun 2023
John Lloyd
3825 Birchwood Dr, Boulder US-CO (40.0436,-105.2618)
species 156.

Canyon Wren

Count  1
4 Jun 2023
Joe McDonnell
Old Saint Vrain Rd
species 157.

American Wigeon

Count  8
4 Jun 2023
Christian Nunes
Lagerman Agricultural Preserve--Lagerman Reservoir
species 158.

Lesser Scaup

Count  3
4 Jun 2023
Christian Nunes
Lagerman Agricultural Preserve--Lagerman Reservoir
species 159.

Wilson's Phalarope

Count  5
3 Jun 2023
Jeff Percell
Little Gaynor Lake
species 160.

Red-naped Sapsucker

Count  1
3 Jun 2023
William Kaempfer
Ward area
species 161.

Orange-crowned Warbler

Count  1
3 Jun 2023
John Salisbury
Chautauqua Park
species 162.

Northern Harrier

Count  1
3 Jun 2023
Nick Schleissmann
Eagle Path
species 163.

Prairie Falcon

Count  1
3 Jun 2023
Nick Schleissmann
Twilight Street, Longmont, Colorado, US (40.194, -105.251)
species 164.

Sharp-shinned Hawk

Count  1
3 Jun 2023
Sandra Hardy Reigel
Boulder Mountain Park--Bear Canyon Trail
species 165.

Least Flycatcher

Count  1
3 Jun 2023
Thomas Heinrich
St. Vrain River Crossing at 63rd St.
species 166.

Sora

Count  1
2 Jun 2023
Andy Knolla
Marshall Marsh
species 167.

Yellow-billed Cuckoo

Count  1
2 Jun 2023
Dave Sandahl
Chautauqua Park
species 168.

Lark Bunting

Count  1
2 Jun 2023
Jim Ward
St. Vrain River Crossing at 63rd St.
species 169.

Brown Thrasher

Count  1
2 Jun 2023
Joe McDonnell
Skunk Canyon Trails
species 170.

Northern Pygmy-Owl

Count  1
2 Jun 2023
Bennett Baynham
Gregory Canyon--Gregory Canyon and Ranger Trails
species 171.

Red-headed Woodpecker

Count  1
2 Jun 2023
Karen Coupland
Heil Valley Ranch
species 172.

Willow Flycatcher

Count  1
2 Jun 2023
John Salisbury
Pella Crossing Open Space
species 173.

Dusky Grouse

Count  1
1 Jun 2023
Evan Appel
Eldorado Canyon SP
species 174.

Northern Pintail

Count  1
1 Jun 2023
Patrick Morgan
Lagerman Agricultural Preserve--Lagerman Reservoir
species 175.

Green Heron

Count  1
31 May 2023
Vicky Miles
Pella Crossing Open Space
species 176.

Evening Grosbeak

Count  1
31 May 2023
Ted Floyd
Olive Ridge Campground
species 177.

Ring-billed Gull

Count  1
29 May 2023
Nathan Pieplow
Admiral Arleigh A. Burke Park
species 178.

Bufflehead

Count  1
27 May 2023
Neil Brown
Ponds at 53rd St & Rte 66
species 179.

Loggerhead Shrike

Count  1
27 May 2023
Rhianna Truex
4380–4506 Hygiene Rd, Longmont US-CO 40.18894, -105.24788
species 180.

Northern Goshawk

Count  1
27 May 2023
Debra Sparn
Flagstaff House Ce, Boulder US-CO 40.00725, -105.29458
species 181.

Lesser Yellowlegs

Count  1
27 May 2023
Rob Cassady
Lagerman Agricultural Preserve--Lagerman Reservoir
species 182.

Sandhill Crane

Count  1
27 May 2023
Neil Brown
7380 Ute Highway, Longmont, Colorado, US (40.203, -105.183)
species 183.

Lewis's Woodpecker

Count  1
27 May 2023
Steven Mlodinow
Overland Loop Trail
species 184.

Barn Owl

Count  2
27 May 2023
Cole Wild
Pella Crossing Open Space
species 185.

Northern Saw-whet Owl

Count  1
26 May 2023
Cole Wild
Lost Gulch Overlook
species 186.

Cassin's Kingbird

Count  1
26 May 2023
Dan Zmolek
Boulder Reservoir complex--Boulder Reservoir
species 187.

Black-necked Stilt

Count  2
26 May 2023
Leslie S
Little Gaynor Lake
species 188.

Baltimore Oriole

Count  1
26 May 2023
Eric DeFonso 🦑
East Boulder Trail--Teller Lakes
species 189.

Stilt Sandpiper

Count  1
25 May 2023
Courtney Rella
Little Gaynor Lake
species 190.

Brewer's Sparrow

Count  1
25 May 2023
Christian Nunes
Walker-OSMP
species 191.

Chestnut-sided Warbler

Count  1
25 May 2023
Andy Knolla
Marshall Marsh
species 192.

Northern Waterthrush

Count  1
24 May 2023
Ted Floyd
University of Colorado campus--Confluence Ponds and Skunk Creek
species 193.

Black-throated Green Warbler

Count  1
24 May 2023
Michael Morton
Skunk Canyon Trails
species 194.

Clay-colored Sparrow

Count  1
23 May 2023
Leslie S
Boulder Reservoir complex--Boulder Reservoir
species 195.

Ferruginous Hawk

Count  1
23 May 2023
Ted Floyd
Waneka Lake/Greenlee Preserve
species 196.

American Pipit

Count  2
22 May 2023
Dave Hallock
Switzerland Trail
species 197.

Blue-winged Warbler

Count  1
21 May 2023
Peter Gent
Gregory Canyon
species 198.

Least Sandpiper

Count  3
21 May 2023
Peter Burke
Lagerman Agricultural Preserve--Lagerman Reservoir
species 199.

White-faced Ibis

Count  1
21 May 2023
Peter Burke
Lagerman Agricultural Preserve--Lagerman Reservoir
species 200.

Common Goldeneye

Count  1
21 May 2023
Robert King
Lagerman Agricultural Preserve--Lagerman Reservoir
species 201.

Sanderling

Count  1
20 May 2023
Jeremy Alcorn
Little Gaynor Lake
species 202.

Franklin's Gull

Count  2
20 May 2023
Karen Coupland
Lagerman Agricultural Preserve--Lagerman Reservoir
species 203.

Short-billed Dowitcher

Count  1
20 May 2023
James Campbell
Stearns Lake
species 204.

Forster's Tern

Count  1
20 May 2023
James Campbell
Stearns Lake
species 205.

Red-necked Phalarope

Count  1
20 May 2023
Karen Coupland
Little Gaynor Lake
species 206.

Northern Parula

Count  1
20 May 2023
Steven Mlodinow
Golden Ponds Park and Nature Area
species 207.

Semipalmated Plover

Count  1
20 May 2023
Thomas Heinrich
Lagerman Agricultural Preserve--Lagerman Reservoir
species 208.

Summer Tanager

Count  1
20 May 2023
Emily Ringoen
Golden Ponds Park and Nature Area
species 209.

Baird's Sandpiper

Count  1
20 May 2023
John Vanderpoel
Little Gaynor Lake
species 210.

Philadelphia Vireo

Count  1
20 May 2023
matt nipper
University of Colorado campus--Confluence Ponds and Skunk Creek
species 211.

Long-billed Dowitcher

Count  1
19 May 2023
David Waltman
Little Gaynor Lake
species 212.

Caspian Tern

Count  1
19 May 2023
carl starace
Golden Ponds Park and Nature Area
species 213.

Greater Yellowlegs

Count  1
18 May 2023
Susan Ringoen
Waneka Lake/Greenlee Preserve
species 214.

Northern Cardinal

Count  1
18 May 2023
David Waltman
Parkside Park, Boulder US-CO 40.03908, -105.26472
species 215.

White-throated Sparrow

Count  1
16 May 2023
Jeff Percell
KOA Lake
species 216.

Yellow-throated Vireo

Count  1
16 May 2023
Deb Piranian
University of Colorado campus--Confluence Ponds and Skunk Creek
species 217.

Hooded Merganser

Count  1
16 May 2023
Sue Riffe
Lagerman Agricultural Preserve--Lagerman Reservoir
species 218.

Palm Warbler

Count  1
16 May 2023
Kathryn Kay
University of Colorado campus--Confluence Ponds and Skunk Creek
species 219.

Black Tern

Count  4
16 May 2023
Cole Wild
Ish Reservoir (Larimer/Boulder cos.)
species 220.

Tennessee Warbler

Count  1
16 May 2023
Cole Wild
Ish Reservoir (Larimer/Boulder cos.)
species 221.

Golden-crowned Kinglet

Count  1
16 May 2023
Kenna Sue Trickey
Eldorado Canyon SP
species 222.

Cattle Egret

Count  1
16 May 2023
Sean Dunlavy
Golden Ponds Park and Nature Area
species 223.

Blackpoll Warbler

Count  1
15 May 2023
Rob Cassady
North Open Space
species 224.

Black-throated Gray Warbler

Count  2
15 May 2023
Curtis Beimborn
Boulder Creek--CU East Campus
species 225.

Hooded Warbler

Count  1
15 May 2023
Valentina Roumi
University of Colorado campus--Confluence Ponds and Skunk Creek
species 226.

Nashville Warbler

Count  1
15 May 2023
David Dowell
Golden Ponds Park and Nature Area
species 227.

Gray Flycatcher

Count  1
15 May 2023
Karen Coupland
University of Colorado campus--Confluence Ponds and Skunk Creek
species 228.

Cassin's Vireo

Count  1
15 May 2023
Jan Swaney
Golden Ponds Park and Nature Area
species 229.

Harris's Sparrow

Count  1
15 May 2023
John Bryan
Hall Ranch--South
species 230.

Black-and-white Warbler

Count  1
15 May 2023
Thomas Heinrich
Boulder Creek--CU East Campus
species 231.

Willet

Count  1
14 May 2023
Chris Petrizzo
Carolyn Holmberg Preserve & Rock Creek Farms
species 232.

Western Sandpiper

Count  1
14 May 2023
Kelli Deeter
Greenway from CR 1 to E 17th Ave
species 233.

Ash-throated Flycatcher

Count  1
13 May 2023
Chris Pagliaro
My home
species 234.

Solitary Sandpiper

Count  1
13 May 2023
Scott Brown
Lagerman Agricultural Preserve--Lagerman Reservoir
species 235.

Cape May Warbler

Count  1
12 May 2023
Steven Mlodinow
Longmont, Peregrine Circle
species 236.

White-eyed Vireo

Count  1
12 May 2023
Stephen Chang
Golden Ponds Park and Nature Area
species 237.

Yellow-throated Warbler

Count  1
11 May 2023
Thomas Heinrich
3rd & Forest
species 238.

Greater Scaup

Count  1
11 May 2023
Christian Nunes
Lagerman Agricultural Preserve--Lagerman Reservoir
species 239.

Semipalmated Sandpiper

Count  1
10 May 2023
Mark Minner-Lee 🦉
Lagerman Agricultural Preserve--Lagerman Reservoir
species 240.

Red-breasted Merganser

Count  1
9 May 2023
Richard Trinkner
Boulder Community Garden
species 241.

Canvasback

Count  1
8 May 2023
Karen Coupland
Lagerman Agricultural Preserve--Lagerman Reservoir
species 242.

Marbled Godwit

Count  2
7 May 2023
John Vanderpoel
Lagerman Agricultural Preserve--Lagerman Reservoir
species 243.

Merlin

Count  1
7 May 2023
John Vanderpoel
Old Saint Vrain Rd
species 244.

Yellow-crowned Night-Heron

Count  1
7 May 2023
Christian Nunes
Golden Ponds Park and Nature Area
species 245.

Calliope Hummingbird

Count  1
7 May 2023
Mary Makepeace
Copper Rock, Colorado, US
species 246.

Whimbrel

Count  2
6 May 2023
Richard Chant
Walden Ponds
species 247.

Horned Grebe

Count  1
6 May 2023
Jeff Yegian
Lagerman Reservoir, Longmont US-CO (40.1353,-105.1910)
species 248.

Sage Thrasher

Count  1
6 May 2023
Emily Warner
Waneka Lake/Greenlee Preserve--Waneka Lake only
species 249.

Long-billed Curlew

Count  2
6 May 2023
Madison Abbott
Walden Ponds, Boulder US-CO 40.04390, -105.18421
species 250.

Pinyon Jay

Count  1
6 May 2023
Thomas Heinrich
3rd & Forest
species 251.

White-tailed Ptarmigan

Count  1
4 May 2023
Evan Tucker
80481, Ward US-CO 40.05427, -105.58206
species 252.

Trumpeter Swan

Count  1
3 May 2023
Patricia Cullen
6835 Hygiene Rd, Longmont US-CO 40.18883, -105.19406
species 253.

Prairie Warbler

Count  1
3 May 2023
Peter Gent
Lykins Gulch
species 254.

Bonaparte's Gull

Count  1
2 May 2023
Patrick Morgan
Lagerman Agricultural Preserve--Lagerman Reservoir
species 255.

American Tree Sparrow

Count  1
2 May 2023
Chris Petrizzo
Teller Lakes South
species 256.

Townsend's Warbler

Count  1
1 May 2023
Matt Fyfe
University of Colorado campus--Confluence Ponds and Skunk Creek
species 257.

Common Loon

Count  2
1 May 2023
Tim Smart
Valmont Overlook (Legion Park)
species 258.

California Gull

Count  1
1 May 2023
Jeremy Alcorn
Boulder Reservoir complex--Boulder Reservoir
species 259.

Golden-crowned Sparrow

Count  1
30 Apr 2023
Catherine Labio
Marshall Marsh
species 260.

Eastern Meadowlark

Count  2
30 Apr 2023
Dan Zmolek
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 261.

Red-bellied Woodpecker

Count  1
30 Apr 2023
Chris Petrizzo
Walden Ponds Wildlife Habitat--Cottonwood Marsh/Wally Tove's Pond/Duck Pond
species 262.

Upland Sandpiper

Count  1
29 Apr 2023
Leslie S
Boulder Reservoir complex--Boulder Reservoir
species 263.

Snow Goose

Count  1
27 Apr 2023
Laura Salter
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 264.

Black Phoebe

Count  1
22 Apr 2023
Laura Steadman
University of Colorado Boulder--South Campus
species 265.

Cackling Goose

Count  1
21 Apr 2023
Hunter Johnson
Viele Park
species 266.

Curve-billed Thrasher

Count  1
18 Apr 2023
Cole Wild
Gunbarrel Hill
species 267.

Mexican Duck

Count  1
18 Apr 2023
Eric DeFonso 🦑
Stearns Lake
species 268.

Bohemian Waxwing

Count  2
18 Apr 2023
Ernest Crvich
Pleasant View Marsh
species 269.

Sagebrush Sparrow

Count  1
16 Apr 2023
Dan Zmolek
Mesa Reservoir
species 270.

Winter Wren

Count  1
14 Apr 2023
Rob Cassady
Boulder Creek--75th St.
species 271.

Herring Gull

Count  1
12 Apr 2023
Dorian Anderson
Boulder Reservoir complex--Boulder Reservoir
species 272.

Barrow's Goldeneye

Count  1
11 Apr 2023
Joe Marino
University of Colorado Boulder, Boulder US-CO (40.0134,-105.2455)
species 273.

Black-throated Sparrow

Count  1
7 Apr 2023
Ellen Harris
248 Old South Saint Vrain Rd, Lyons US-CO 40.21367, -105.27478
species 274.

Rough-legged Hawk

Count  1
4 Apr 2023
Karen Coupland
Road to Rabbit Mountain
species 275.

Ross's Goose

Count  1
3 Apr 2023
Grant Wiest
Stearns Lake
species 276.

Northern Shrike

Count  1
3 Apr 2023
Jeff Yegian
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 277.

Eastern Bluebird

Count  1
1 Apr 2023
rhiana Hickey
Shanahan Ridge Trailhead
species 278.

Yellow-bellied Sapsucker

Count  1
1 Apr 2023
Karen Coupland
7712 Niwot Rd, Niwot US-CO (40.1012,-105.1739)
species 279.

Swamp Sparrow

Count  1
28 Mar 2023
Eric DeFonso 🦑
Stearns Lake
species 280.

Short-eared Owl

Count  1
27 Mar 2023
Nick Moore
Lagerman Agricultural Preserve--Lagerman Reservoir
species 281.

Varied Thrush

Count  1
22 Mar 2023
Valentina Roumi
1405 Wildwood Lane, Boulder, Colorado, US (39.975, -105.266)
species 282.

Long-tailed Duck

Count  1
15 Mar 2023
Scott Brown
Lagerman Agricultural Preserve--Swede Lakes
species 283.

Lesser Black-backed Gull

Count  1
12 Mar 2023
Kevin Smith
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together
species 284.

Greater White-fronted Goose

Count  1
12 Mar 2023
Rob Cassady
Harper Lake area
species 285.

Gray-crowned Rosy-Finch

Count  7
5 Mar 2023
Harold Eyster
Brainard Lake
species 286.

Brown-capped Rosy-Finch

Count  1
4 Mar 2023
Robin Allison
124 Ski Road
species 287.

Iceland Gull

Count  1
4 Mar 2023
Alexander Brown
Baseline Reservoir
species 288.

Rusty Blackbird

Count  1
27 Feb 2023
Jeff Yegian
Waneka Lake/Greenlee Preserve
species 289.

Black Rosy-Finch

Count  1
23 Feb 2023
Harrison Wheeler
Ward area
species 290.

Tundra Swan

Count  1
1 Feb 2023
John Bryan
McIntosh Lake
species 291.

Common Redpoll

Count  1
25 Jan 2023
Owen Robertson
Chautauqua Park (village)
species 292.

Lapland Longspur

Count  1
4 Jan 2023
David Dowell
Joder Ranch
species 293.

Purple Finch

Count  1
2 Jan 2023
Harrison Wheeler
Rock Creek Neighborhood
species 294.

Long-eared Owl

Count  1
Sensitive

Exotic: Escapee

Swan Goose

Count  1
12 May 2023
Scott Brown
Boulder Creek--University of Colorado campus

Indian Peafowl

Count  1
9 Apr 2023
Casey Menick 🦤
Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together

African Collared-Dove

Count  1
8 Apr 2023
Owen Robertson
Louisville (town)

Mute Swan

Count  X
19 Mar 2023
Anonymous eBirder
Lagerman Agricultural Preserve--Swede Lakes

Chukar

Count  1
10 Feb 2023
art reisman
Elgin drive

Hybrids

Lazuli x Indigo Bunting (hybrid)

Count  1
5 Jun 2023
art reisman
Eldorado Mountain Open Space

Western x Clark's Grebe (hybrid)

Count  1
15 May 2023
Winston Liu
Waneka Lake/Greenlee Preserve

Mallard x Mexican Duck (hybrid)

Count  1
3 May 2023
Ted Floyd
University of Colorado campus--Confluence Ponds and Skunk Creek

Cinnamon Teal x Northern Shoveler (hybrid)

Count  1
30 Apr 2023
Rob Cassady
Hodgson-Harris Reservoir

Graylag x Swan Goose (hybrid)

Count  1
9 Apr 2023
Scott Brown
2642 Tabriz Pl, Boulder US-CO (40.0358,-105.2617)

Tufted Duck x scaup sp. (hybrid)

Count  1
28 Mar 2023
Jeremy Alcorn
Lagerman Agricultural Preserve--Lagerman Reservoir

Snow/Ross's x Cackling/Canada Goose (hybrid)

Count  2
18 Feb 2023