In San Francisco, on top of the PG&E headquarters’ 33rd floor, a nest box has been placed for a mated pair of Peregrine falcons. You can watch their antics on the live nest cam. Recently some chicks hatched, and scientists from UC Santa Cruz placed bands on the babies’ legs to ID and track them when they leave the nest.

Baby falcons are commonly called eyases, meaning an unfledged (still in baby down feathers) nestling that is not able to prey on its own. These eyases look a bit cranky about being handled and unable to make the big, ugly, featherless animals go away. ๐Ÿ™‚

The birds are not harmed by this procedure. The tool being used looks like pliers but it’s really just a crimper that closes the open metal ID band around the bird’s leg. The band fits loosely so as not to compress skin or circulation.

Images Copyright 2005 Pacific Gas and Electric

2 Responses to “Birdblogging: Peregrine Babies”
  1. Anon says:

    Most animals are really cute when they’re younguns. These birds, however, are pretty ugly little chickies.

  2. Anne Haight says:

    Birds are definitely one of those animals that are not cute when they’re babies, with the exception of baby chickens, geese, and ducks.

    But parrots and raptors, ugh. They’re so ugly they’re adorable. ๐Ÿ™‚

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