Checklist S61920416

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Owner Anonymous eBirder

Stationary
  • 1

Submitted from eBird for iOS, version 1.9.18

Observations

  1. Number observed: 4

    Details: At least 2 m, 2 f mixed in with very active diving GRSC flock to the east of the park. Flagged as rare in San Mateo County.

    Age & Sex:
    Juvenile Immature Adult Age Unknown
    Male 2
    Female 2
    Sex Unknown
  2. Number observed: 348

    Details: Individually counted and sexed. 247 m, 101 f mostly together in very active diving flock to the east of the park. Flock was mostly monospecific with a few REDH and LESC mixed in. Some additional individuals spread out across the bay, close enough to identify.

    Age & Sex:
    Juvenile Immature Adult Age Unknown
    Male 247
    Female 101
    Sex Unknown
  3. Number observed: 7

    Details: 5 m, 2 f mixed in with very active diving GRSC flock to the east of the park.

    Age & Sex:
    Juvenile Immature Adult Age Unknown
    Male 5
    Female 2
    Sex Unknown
  4. Greater/Lesser Scaup

    Number observed: 83

    Details: Individually counted and sexed. 32 m, 6 f, 45 unk spread out across the bay, individuals diffusely mixed in with BUFF, COGO, SUSC, RUDU. Too distant to identify to species and many too distant to sex. Adult males more discernible at extreme distance, potentially biasing sex ratio.

    Age & Sex:
    Juvenile Immature Adult Age Unknown
    Male 32
    Female 6
    Sex Unknown 45