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Checklist S46301131

 
Location
Rodeo Lagoon, Marin County, California, US ( Map ) ( Hotspot )
Date and Effort
Mon Jun 04, 2018 7:35 AM
Protocol:
Traveling
Party Size:
1
Duration:
2 hour(s), 20 minute(s)
Distance:
2.5 mile(s)
Observers:
William Legge
Comments:
Wind W, light but increasing, clear and sunny, with temperatures rising to 18C/64F. 20 minute sea watch from Rodeo Beach followed by a circuit of the main lagoon. Mammals of note: 1 River Otter in the main lagoon and 1 California Sea Lion in the green buoy offshore.
Species
60 species total
4
3

Plus the two broods of 3 - one on each lagoon

5

On the ocean off Rodeo Beach - big decline in number from last week.

1

Adult at the eastern end of the main lagoon

97

On the ocean off Rodeo Beach

3

On the ocean with Western Grebes

1
2
1

On nest at Bird Island

250

Estimate - flew S offshore in 20 minutes of watching, plus 3 on Bird Island

4

On the ocean off Rodeo Beach/Bird Island

1

Adult flew N offshore

36
4

3 flew S and 1 N along the coastline

2

Flyover adult and a second bird present mid-morning which I put down to a bleached 2nd summer (3rd CY) or perhaps a hybrid Glaucous-winged/Glaucous Gull given how white it was. Glaucous Gull ruled out given the 'dirty bill'. Some poor digiscoped photos below.

ML103241861

© William Legge

Average Quality

Presumed Glaucous-winged Gull (2nd Summer) - Rodeo Beach, Marin, California, USA - June 4, 2018

Age:
Immature
Sex:
Sex Unknown
ML103241931

© William Legge

Average Quality

Presumed Glaucous-winged Gull (2nd Summer) - Rodeo Beach, Marin, California, USA - June 4, 2018

Age:
Immature
Sex:
Sex Unknown
ML103242001

© William Legge

Average Quality

Presumed Glaucous-winged Gull (2nd Summer) - Rodeo Beach, Marin, California, USA - June 4, 2018

Age:
Immature
Sex:
Sex Unknown
ML103243511

© William Legge

Presumed Glaucous-winged Gull (2nd Summer) - Rodeo Beach, Marin, California, USA - June 4, 2018

Age:
Immature
Sex:
Sex Unknown
2
4

3 on the ocean off Rodeo Beach and 1 on the main lagoon, the latter in breeding plumage

1

On the ocean off Rodeo Beach - in breeding plumage

1

On the ocean off Rodeo Beach - non-breeding plumage

10

Offshore

3

Offshore

3

Main lagoon

12

9 flew N and 3 S offshore

5
3
Age & Sex
Juvenile Immature Adult Age Unknown
Male
Female
Sex Unknown 1 2
1
1
1
1
1

Heard only - singing from the cypresses behind the Fire Station

1
3
1
3
1
1
4
6
3
1
2
12
2
3
2
6

First fledged juvenile I have seen this summer at this site

Breeding Code
FL Recently Fledged Young (Confirmed)
7
6
5
1
4
10
4
2
1

Briefly views of a female or 1st summer male in flight near Headlands Visitor Center car park - left south

4
2
5
2
2

Males in song

 

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

Yes