Rocky Mountain Arsenal NWR

Directions Map

Illustrated Checklist

Updated ~10 seconds ago

277 Species Observed

Species w/ Photos

Species w/ Audio

Species Needing Photos

Species Needing Audio

Jump to species

View all media

Hybrids (3)

Snow x Cackling Goose (hybrid) Anser caerulescens x Branta hutchinsii

Last observed by Cathy Sheeter on 24 Nov 2014
Eurasian x American Wigeon (hybrid) Mareca penelope x americana

Last observed by Cathy Sheeter on 2 Nov 2014
Mallard x Mexican Duck (hybrid) Anas platyrhynchos x diazi

Last observed by Ted Floyd on 26 Mar 2023

Additional Taxa (90)

Snow/Ross's Goose Anser caerulescens/rossii

Last observed by Gabriel Wiltse on 9 Dec 2020
Cackling/Canada Goose Branta hutchinsii/canadensis

Last observed by Ted Floyd on 9 Mar 2024
Trumpeter/Tundra Swan Cygnus buccinator/columbianus

Last observed by Matt Blaze on 20 Oct 2020
goose sp. Anatidae (goose sp.)

Last observed by Ellen Fitzpatrick on 24 Mar 2018
Blue-winged/Cinnamon Teal Spatula discors/cyanoptera

Last observed by Candice Johnson on 16 Sep 2023
Mallard/Mexican Duck Anas platyrhynchos/diazi

Last observed by Aaron Dubas on 10 Sep 2023
teal sp. Anatidae sp. (teal sp.)

Last observed by Ted Floyd on 15 Oct 2023
dabbling duck sp. Anatidae sp. (dabbling duck sp.)

Last observed by Archer Silverman on 16 Mar 2024
Greater/Lesser Scaup Aythya marila/affinis

Last observed by Andrew Dolan on 15 Apr 2024
Aythya sp. Aythya sp.

Last observed by Ted Floyd on 9 Mar 2024
Common/Barrow's Goldeneye Bucephala clangula/islandica

Last observed by Kim Mauritz on 23 Mar 2019
Common/Red-breasted Merganser Mergus merganser/serrator

Last observed by Kevin McKown on 15 Oct 2019
duck sp. Anatidae (duck sp.)

Last observed by Shawn Billerman on 2 Apr 2024
Horned/Eared Grebe Podiceps auritus/nigricollis

Last observed by Roger Mattson on 28 May 2023
Western/Clark's Grebe Aechmophorus occidentalis/clarkii

Last observed by Ted Floyd on 15 Oct 2023
grebe sp. Podicipedidae sp.

Last observed by Frank Lehman on 8 Nov 2023
pigeon/dove sp. Columbidae sp.

Last observed by Ted Floyd on 9 Mar 2024
hummingbird sp. Trochilidae sp.

Last observed by Sean Caufield on 29 Aug 2023
Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus

Last observed by Steve Barlow on 18 Aug 2023
Red/Red-necked Phalarope Phalaropus fulicarius/lobatus

Last observed by Michael W. Sack on 21 May 2022
phalarope sp. Phalaropus sp.

Last observed by Felice Lyons on 20 Jul 2022
Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca

Last observed by Kirk Roth on 15 Apr 2024
Tringa sp. Tringa sp.

Last observed by Ted Floyd on 29 Apr 2023
Western/Semipalmated Sandpiper Calidris mauri/pusilla

Last observed by Ted Floyd on 18 Aug 2022
peep sp. Calidris sp. (peep sp.)

Last observed by Kelly Ducham on 26 Aug 2023
Calidris sp. Calidris sp.

Last observed by Jordan Spalding on 16 Aug 2023
large shorebird sp. Scolopacidae sp. (large shorebird sp.)

Last observed by Ted Floyd on 3 Jun 2023
shorebird sp. Charadriiformes sp.

Last observed by Frank Lehman on 8 Nov 2023
Larus sp. Larus sp.

Last observed by Ted Floyd on 9 Mar 2024
gull sp. Larinae sp.

Last observed by Gabrielle LeBeau on 11 Nov 2023
tern sp. Sterninae sp.

Last observed by Kai Webler on 17 Sep 2022
Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianum

Last observed by Candice Johnson on 17 Aug 2023
white egret sp. Egretta/Bubulcus/Ardea sp.

Last observed by Owen Robertson on 17 Jul 2023
Glossy/White-faced Ibis Plegadis falcinellus/chihi

Last observed by Michael Dougherty on 23 Apr 2023
Hen/Northern Harrier Circus cyaneus/hudsonius

Last observed by Hugh Kingery on 8 Oct 1994
Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii

Last observed by Jill Boice on 21 Nov 2022
Accipiter sp. Accipiter sp.

Last observed by Sheridan Samano on 15 Dec 2018
Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus

Last observed by Ted Floyd on 15 Oct 2023
Buteo sp. Buteo sp.

Last observed by James Lukenda on 18 Apr 2024
Buteo/eagle sp. Buteo/eagle sp.

Last observed by David Schulte on 14 Oct 2023
hawk sp. Accipitridae sp. (hawk sp.)

Last observed by Terri Mungle on 13 Apr 2024
eagle sp. Accipitridae sp. (eagle sp.)

Last observed by Lou Schulte on 23 Mar 2024
owl sp. Strigiformes sp.

Last observed by Archer Silverman on 11 Feb 2024
Yellow-bellied/Red-naped Sapsucker Sphyrapicus varius/nuchalis

Last observed by Adam Vesely on 23 Apr 2016
Downy/Hairy Woodpecker Dryobates pubescens/villosus

Last observed by Ted Floyd on 3 Jun 2023
woodpecker sp. Picidae sp.

Last observed by Peter Penning on 30 Jul 2023
large falcon sp. Falco sp. (large falcon sp.)

Last observed by Ken Elkins on 17 Aug 2023
small falcon sp. Falco sp. (small falcon sp.)

Last observed by Ted Floyd on 9 Mar 2024
falcon sp. Falco sp.

Last observed by Ted Floyd on 18 Feb 2023
Western/Eastern Wood-Pewee Contopus sordidulus/virens

Last observed by Ryan Dibala on 22 May 2021
pewee sp. (Contopus sp.) Contopus sp.

Last observed by Abigail Duvall on 18 Jun 2018
Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/traillii

Last observed by Christine Alexander on 30 Jul 2015
Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseri

Last observed by Josh Seibel on 27 Aug 2019
Empidonax sp. Empidonax sp.

Last observed by Ted Floyd on 10 Sep 2022
Myiarchus sp. Myiarchus sp.

Last observed by Hugh Kingery on 13 Sep 2015
Cassin's/Western Kingbird Tyrannus vociferans/verticalis

Last observed by Pauline Reetz on 4 Aug 2023
new world flycatcher sp. Tyrannidae sp.

Last observed by Chris Callinicos on 29 May 2023
Cassin's/Plumbeous Vireo Vireo cassinii/plumbeus

Last observed by Phillip Casteel on 10 May 2019
vireo sp. Vireo sp.

Last observed by Ted Floyd on 6 Jun 2021
Loggerhead/Northern Shrike Lanius ludovicianus/borealis

Last observed by Ted Floyd on 20 Mar 2021
raven sp. Corvus sp. (raven sp.)

Last observed by David Davis on 26 Oct 2022
crow/raven sp. Corvus sp.

Last observed by Ted Floyd on 26 Mar 2023
Black-capped/Mountain Chickadee Poecile atricapillus/gambeli

Last observed by M Siri on 24 Jul 2023
chickadee sp. Poecile sp.

Last observed by Terri Mungle on 28 Apr 2018
Tree/Violet-green Swallow Tachycineta bicolor/thalassina

Last observed by Ted Floyd on 3 Jun 2023
Cliff/Cave Swallow Petrochelidon pyrrhonota/fulva

Last observed by Ken Elkins on 17 Aug 2023
swallow sp. Hirundinidae sp.

Last observed by Sean Caufield on 29 Aug 2023
Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapa

Last observed by Kim Mauritz on 2 Oct 2018
nuthatch sp. Sitta sp.

Last observed by Erica Clark on 5 Aug 2017
bluebird sp. Sialia sp.

Last observed by Archer Silverman on 16 Mar 2024
Catharus sp. Catharus sp.

Last observed by Luis "Beto" Matheus on 14 May 2014
thrush sp. Turdidae sp.

Last observed by Felice Lyons on 12 Sep 2023
new world goldfinch sp. Spinus sp. (goldfinch sp.)

Last observed by Richard Horwitz on 2 Oct 2023
longspur sp. Calcarius/Rhynchophanes sp.

Last observed by Nick Schleissmann on 2 Sep 2023
Spizella sp. Spizella sp.

Last observed by Brian Genge on 7 Oct 2023
Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.

Last observed by Ken Elkins on 19 Feb 2017
Spotted/Eastern Towhee (Rufous-sided Towhee) Pipilo maculatus/erythrophthalmus

Last observed by Sharon Guenther on 9 Dec 2020
towhee sp. Melozone/Pipilo sp.

Last observed by colin 🐦 on 24 Jul 2023
new world sparrow sp. Passerellidae sp.

Last observed by Stephanie Delaney on 21 Jan 2024
Western/Eastern Meadowlark Sturnella neglecta/magna

Last observed by Ted Floyd on 16 Jun 2023
Sturnella meadowlark sp. Sturnella sp.

Last observed by Chris Gilbert on 24 Feb 2024
Bullock's/Baltimore Oriole Icterus bullockii/galbula

Last observed by Ted Floyd on 3 Jun 2023
new world oriole sp. Icterus sp.

Last observed by Ted Floyd on 16 Jun 2023
Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalus

Last observed by Sarah Leavesley on 28 Dec 2015
grackle sp. Quiscalus sp.

Last observed by Robert Raker on 21 Aug 2020
blackbird sp. Icteridae sp.

Last observed by Gregory Miller 🦆 (no playback) on 17 Dec 2023
new world warbler sp. Parulidae sp.

Last observed by John Arthur on 17 Sep 2023
Lazuli/Indigo Bunting Passerina amoena/cyanea

Last observed by Ted Floyd on 10 Sep 2022
passerine sp. Passeriformes sp.

Last observed by Eric Walters on 20 Sep 2023
bird sp. Aves sp.

Last observed by Shey Claflin on 21 Aug 2019

Change Region

Rocky Mountain Arsenal NWR

Explore...

Illustrated Checklist

Custom Time Period

Change Time Period

Native and Naturalized (276)

Exotic: Provisional (1)

Exotic: Escapee (3)

Hybrids (3)

Additional Taxa (90)