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Checklist S48248057

 
Location
Rodeo Lagoon, Marin County, California, US ( Map ) ( Hotspot )
Date and Effort
Sun Sep 02, 2018 6:50 AM
Protocol:
Traveling
Party Size:
1
Duration:
3 hour(s), 30 minute(s)
Distance:
2.5 mile(s)
Observers:
William Legge
Comments:
Wind W, light but increasing, overcast, low clouds/fog above 350 feet, temperatures rising to 16C/60F. 20 minute sea watch from Rodeo Beach followed by a circuit of the main lagoon. Mammals of note: The family of River Otters in the main lagoon.
Species
56 species (+1 other taxa) total
25
38

In three groups

1
1

Heard only from the inner lagoon

1

Western shore of the main lagoon

2

Western shore/mud spit midway down the southern shore of the main lagoon.

18

Eastern end of the main lagoon

1

Tracking Elegant Terns offshore

20

On the ocean off Rodeo Beach

1

Juvenile/1str winter on the ocean off Rodeo Beach

1000

850+ on Bird Island and 150 feeding offshore

25
13

9 juveniles/1st winters at the main lagoon, 3 adults briefly and 1 flew S offshore

1
ML113278321

© William Legge

Average Quality

Caspian Tern - Rodeo Lagoon, Marin County, California, USA - September 2, 2018

Age:
Adult
Sex:
Sex Unknown
170

Flew N offshore in a 10 minute period, some stopping to feed

380

325 on Bird Island, and 55 flew N offshore

23

20 flew over NW (in groups of 17 & 3) and 3 on the main lagoon

Breeding Code
F Flyover (Observed)
740

Up to 175+ on the main lagoon, 160 on Bird Island and 405 flew N offshore in 20 minutes of sea watching

2
5
11
1

Juvenile

1
1

Heard only

1

Simmonds Road

2
2
6
Pacific-slope/Cordilleran Flycatcher (Western Flycatcher)
3
1
5
13

Slowly worked their way SE in a flock - first detected movement of the fall

Breeding Code
F Flyover (Observed)
1
10

Including 6 moving S

1
4
16

10+ present and a flock of 6 flew S along the beach

4
12
10
5
8
8
2
5
ML113279341

© William Legge

Average Quality

Molting male American Goldfinch - Rodeo Lagoon, Marin County, California, USA - September 2, 2018

Age:
Adult
Sex:
Male
9
3

Together in the dunes at the western end of the main lagoon

9
2
7
1
27
30

Exact count although almost certainly an underestimate of the true number out there right now.

1

1st winter in willows along Lagoon Trail (south side of the main lagoon)

2

Simmonds Road Cypress trees

10
1
 

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

Yes