Bob, I agree. However, I did count them in SE Alaska

Doug Robberson
Tigard, OR


> I agree but I will not count them in Washington since people who catch them
> and measure them can not find any.
> Bob Norton
> norton36 at olypen.com
> Joyce (near Port Angeles), WA
> ----- Original Message -----
> From: "Guy McWethy" <lguy_mcw at yahoo.com>
> To: <tweeters at u.washington.edu>
> Sent: Thursday, December 31, 2009 1:33 PM
> Subject: Re: [Tweeters] NW vs AM Crow - Mimics
>
>
>> Hey tweets,
>> Just to add my 2-cents worth in ...
>>
>> Crows are great mimics. How do you suppose we can differentiate these 2
>> species (if they are) by call, when they are probably copying each others
>> calls anyway?
>> I would EXPECT to hear indivduals giving both calls.
>>
>> Behaviour and foraging tactics might be a better way of differntiating
>> them (NW are supposed to be more inter-tidal foragers). But again, any
>> American Crow is going to mimic a successful foraging technique as well.
>>
>> Personally, if I come across a small crow foraging in the inter-tidal
>> zone, I will at least consider that it could be a NW Crow (or at least
>> have some genetics in common with one). And I count them as NW on my
>> county lists.
>>
>> However, I would be hard-pressed to justify it as a Lifer. Luckily, I
>> have seen and heard NW Crow in BC and Alaska, so I am free-and-clear about
>> them, anyway!
>>
>> Clearly, a lot of genetic work needs to be done To answer the question if
>> the 2 are interbreeding here in the Puget Sound. But given that our
>> American Crows living here in the Northwest are small anyway, AND that
>> they are probably copying each others calls and behaviours, being able to
>> tell the American Crows from the NW Crow is a tough proposition in the
>> field.
>>
>> Guy McWethy
>> Renton, WA
>> mailto: lguy_mcw at yahoo.com
>>
>>
>>
>>
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>
>
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