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Checklist S48176654

 
Location
Rodeo Lagoon, Marin County, California, US ( Map ) ( Hotspot )
Date and Effort
Thu Aug 30, 2018 7:30 AM
Protocol:
Traveling
Party Size:
1
Duration:
3 hour(s), 30 minute(s)
Distance:
2.5 mile(s)
Observers:
William Legge
Comments:
Wind W, very light at times almost calm, overcast with low clouds, 14C/57C. 20 minute sea watch from Rodeo Beach followed by a circuit of the main lagoon. Mammals of note: 2 Harbor Porpoise offshore, 1 Harbor Seal on Bird Island, and a Coyote on the southern shore of Rodeo Lagoon. Again - very birdy with plenty of passerine migrants, particularly warblers.
Species
67 species (+1 other taxa) total
21
Mallard
8
Surf Scoter

On the ocean off Rodeo Beach

13
California Quail
4
Anna's Hummingbird
2
Virginia Rail

Heard only from the eastern end of the main lagoon

1
Black Oystercatcher

Bird Island

2
Semipalmated Plover

Circled high over the main lagoon and left SE

Breeding Code
F Flyover (Observed)
2
Marbled Godwit

Continuing at the western shore of the main lagoon/outlet channel

ML112895361

© William Legge

Average Quality

Marbled Godwit - Rodeo Lagoon, Marin County, California, USA - August 30, 2018

4
Least Sandpiper

Western shore of the main lagoon

1
Western Sandpiper

Western shore of the main lagoon

12
Red-necked Phalarope

10 at the eastern end of the main lagoon and 2 in the outlet channel

ML112892591

© William Legge

Average Quality

Red-necked Phalarope (10 of 12 present) - Rodeo Lagoon, Marin County, California, USA - August 30, 2018

1
Greater Yellowlegs

Continuing on the southern shoreline of the main lagoon

80
Common Murre

On the ocean off Rodeo Beach

450
Heermann's Gull

Good estimate - most roosting on Bird Island

30
Western Gull
8
California Gull

Mostly 1st winters/juveniles at the main lagoon

1
Glaucous-winged Gull

The regular adult briefly at the main lagoon

4
Caspian Tern
1
Common Loon

Continuing on the ocean just off Rodeo Beach - in non-breeding plumage

245
Brandt's Cormorant

Good estimate. 230 on Bird Island and 15+ on the ocean off Rodeo Beach

27
Double-crested Cormorant

22 flew over S/SE in flocks of 15 & 7, 2 flew over NW and 3+ on the main lagoon

Breeding Code
F Flyover (Observed)
590
Brown Pelican

Good estimates: 260 on Bird Island, up to 200 visiting the main lagoon at any one time, and 130 flew N along the coastline

2
Great Blue Heron
8
Great Egret
13
Snowy Egret

10 present and a flock of 3 flew over NW

2
Black-crowned Night-Heron

Juveniles

2
Turkey Vulture
1
Red-tailed Hawk
2
Downy Woodpecker
1
Northern Flicker

Heard only

5
Pacific-slope/Cordilleran Flycatcher (Western Flycatcher)
4
Black Phoebe
2
Warbling Vireo
6
California Scrub-Jay
2
American Crow
4
Common Raven
8
Northern Rough-winged Swallow

2+ preempt and a flock of 6 flew over S

Breeding Code
F Flyover (Observed)
2
Tree Swallow
1
Violet-green Swallow
20
Barn Swallow

10 flew through S and 10+ present

2
Cliff Swallow
1
Chestnut-backed Chickadee
4
Pygmy Nuthatch

At a minimum. In the Eucalyptus trees just north of the Headlands Center for the Arts

1
Brown Creeper

Possibly two in the Eucalyptus trees just north of the Headlands Center for the Arts with Pygmy Nutchatches

2
House Wren

Both seen (and heard)

1
Marsh Wren

Heard only

10
Bewick's Wren
15
Wrentit
6
Western Bluebird
1
Swainson's Thrush

Heard only

2
European Starling
5
House Finch
5
American Goldfinch
9
Dark-eyed Junco (Oregon)
15
White-crowned Sparrow
3
Savannah Sparrow
18
Song Sparrow
2
California Towhee
6
Spotted Towhee
1
Nashville Warbler

The continuing female/1st winter favoring coyote bushes at the base of the 'quarry'/cliff on the northern side of the main lagoon

ML112896391

© William Legge

Average Quality

Nashville Warbler (Female/1st winter) - Rodeo Lagoon, Marin County, California, USA - August 30, 2018

Age:
Unknown
Sex:
Female
ML112896671

© William Legge

Nashville Warbler (Female/1st winter) - Rodeo Lagoon, Marin County, California, USA - August 30, 2018

Age:
Unknown
Sex:
Female
1
MacGillivray's Warbler

Female/1st winter favoring coyote bushes at the base of the 'quarry'/cliff on the northern side of the main lagoon

ML112897041

© William Legge

Average Quality

MacGillivray's Warbler - Rodeo Lagoon, Marin County, California, USA - August 30, 2018 (cropped photo)

Age:
Unknown
Sex:
Sex Unknown
29
Common Yellowthroat
11
Yellow Warbler

Much more numerous today

1
Black-throated Gray Warbler

Adult female favoring the coyote bushes at the base of the 'quarry'/cliff on the northern side of the main lagoon

ML112897261

© William Legge

Average Quality

Black-throated Gray Warbler - Rodeo Lagoon, Marin County, California, USAA - August 30, 2018

Age:
Adult
Sex:
Female
5
Townsend's Warbler

3 at the Simmonds Road Cypress trees and 2 in the Bunker Road willows backing onto the Headlands Visitor Center

5
Hermit Warbler

Another record count! All 1st winters in various shades - 3 in Cypress trees/Monterey Pines at the junction of Field and Simmonds Roads with Townsend's and other Warblers and 2 in the Eucalyptus trees just north of the Headlands Center for the Arts

10
Wilson's Warbler
1
Western Tanager

1st winter at Simmonds Road

 

Are you submitting a complete checklist of the birds you were able to identify?

Yes