Date: 9/26/19 12:37 pm From: Wayne Weber <contopus...> Subject: [obol] Re: Red Crossbill Types
Alex and Oregon Birders,
Contrary to your statement, at least some of the Red Crossbill types CAN be distinguished easily by ear. When I was a teenager growing up in the Okanagan Valley of BC, decades ago, I noticed that some crossbills gave a sharp “chip-chip-chip” call, and others gave a metallic-sounding “click-click-click” call. When Craig Benkman and others began publishing articles in the 1990s about call types, I had an “Aha!” moment. I realized that what I had been hearing were Type 2 Red Crossbills, the “Ponderosa pine type” (the chip-chip-chip birds) and Type 4, the “Douglas-fir type” (the click-click-click birds). With a bit of practice and reference to recorded calls, it should be possible to recognize call types in the field most if not all of the time.
Wayne C. Weber
From: <obol-bounce...> [mailto:<obol-bounce...>] On Behalf Of Alex Lamoreaux
Sent: Thursday, September 26, 2019 11:48 AM
Cc: OBOL; <eskyrimh...>; <tc...>
Subject: [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?