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Research About Birds
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Banded
California Gulls |
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This year, we began
color banding gull chicks in an effort to better understand
the influence, if any, Mono birds have on the rapidly growing
population in the San Francisco Bay area as well as other satellite
populations. The bay area nesting population has essentially
shown exponential growth since it was found in 1980 (the year
Mono Lake gulls abandoned their colony location due to coyotes
gaining access to it from the lowered lake level, and moved
to smaller surrounding islets of Mono Lake). California Gulls,
which never historically bred in this coastal location, are
having negative impacts on terns, avocets, and stilts that nest
in the bay marshes.
Any information on Mono Lake California Gull distribution in
non-breeding season as well as breeding season is useful.
This year we banded the gulls with a pale
blue plastic band over the standard silver band on the left
leg.
Please let us know if you see a juvenile California Gull
with this color band, as well as the date and location.
Kristie Nelson
or Ann Greiner
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