Date: 9/26/19 12:01 pm From: Tom Crabtree <tc...> Subject: [obol] Re: Red Crossbill Types
And a friendly rebuttal – not true. IDing types by ear is possible, “To be able to identify all individuals of each call type with 100% certainty, audiospectrographic analysis is needed.” https://ebird.org/news/recrtype/
From: Alex Lamoreaux [mailto:<aslamoreaux...>]
Sent: Thursday, September 26, 2019 11:48 AM
Cc: OBOL; <eskyrimh...>; <tc...>
Subject: Re: [obol] Re: Red Crossbill Types
And just another friendly reminder that call types cannot be determined without analyzing the spectrogram of a recording. IDing the types by ear is not possible.
On Thu, Sep 26, 2019 at 12:01 PM Philip Kline <pgeorgekline...> wrote:
In my fairly limited experience in Northwestern Oregon, the general rule of thumb seems to be that Type 3 is more common in the Coast Range and the west side of the Cascades (this is the type I've identified most often in the general Portland area), Type 10 is usually found on the immediate coast and nowhere else, and Type 4 can often be found in the Cascades, but doesn't seem to be particularly common. All this is with a huge dollop of uncertainty and the caveat as Lars notes that they are so nomadic they can be completely absent (or at least much harder to find) from these areas for long periods. I would be curious to hear from others with more experience if any of these general assumptions are incorrect.
On Thu, Sep 26, 2019, 10:19 AM Tom Crabtree <tc...> wrote:
Type 2’s can be found in profusion around Bend & Sisters.
Tom Crabtree, Bend
From: <obol-bounce...> [mailto:<obol-bounce...>] On Behalf Of Erik Haney
Sent: Thursday, September 26, 2019 10:08 AM
Subject: [obol] Red Crossbill Types
I'm inquiring on the different types of Red Crossbill that can be found in Oregon, preparing
for a trip from October 30th to November 10th mostly all over Oregon from Bend/Sister area
to Medford/Ashland area and three days along the whole coast south to the north. Are
the different types specific to certain areas in the state or are they more habitat specific?