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Re: [CALBIRDS] "Black-backed" Lesser Goldfinch status

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  • Don Roberson
    Monterey Birds (2002) treated this as polymorphism, to wit, at least twice local birds have appeared to be entirely or almost entirely black-backed: one
    Message 1 of 3 , Feb 16, 2009
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      Monterey Birds (2002) treated this as polymorphism, to wit, "at least
      twice local birds have appeared to be entirely or almost entirely
      black-backed: one banded at Big Sur R. mouth 28 Jun 1993, and one
      observed below Junipero Serra Peak 20 May 2000 (J.N. Davis). Black-
      backed races (i.e., nominate psaltria) occur as close as eastern
      Arizona but there is no reason to suspect that these MTY sighting in
      summer involve vagrants. Rather, it seems exceedingly likely that
      black-backed individuals are a rare variant within local populations.
      Phillips, Marshall & Monson (1964) conaidered black-backed males to
      be simply a color morph within the U.S. populations . . the only
      truly black-backed subspecies they recognized was mexicanus of Mexico
      and Central America."

      Don Roberson
      Pacific Grove CA
      http://montereybay.com/creagrus/
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