Date: 10/30/19 8:54 am
From: Alan Contreras <acontrer56...>
Subject: [obol] Re: Costa's probably hybrid
Old articles from Auk are available on the SORA database.

I would use more modern sources before the 1978 article, in part because more is known now. The problem here is that we have two competing truths:

a. hummingbirds can learn songs
b. hybrids can sing the song of a parent

It seems to me that these things more or less cancel out and we are left with plumage and structure.

Alan Contreras
Eugene, Oregon

Attending Christmas Bird Counts with good weather forecasts.

> On Oct 30, 2019, at 8:40 AM, <rriparia...> wrote:
> Looking further into this bird,
> I found an article:
> Wells at. al. , 1978, Auk 95
> The abstract discusses hybrids between Costa's and Anna's with males appearing most like Costa's and giving a song typical of Anna's.
> I did not have access to and did not read the article.
> Maybe others have already concluded that this bird is likely a hybrid, so I'm a little slow here. I thought it was interesting that observations of this bird are supported in this cited literature.
> Sent from my Verizon LG Smartphone

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