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posted October 5th, 2010; last edited October 5th, 2010 –– David Sibley

You too can record and identify Crossbill call types

If you’ve followed any of the discussions about identifying Red Crossbill call types, you may have given up on taking an active role in crossbill study, thinking that it would require thousands of dollars worth of recording equipment and computer software. Well, that is simply wrong. Most people can enter the field and start identifying [...]

October 5th, 2010 | One comment
posted September 21st, 2010; last edited September 21st, 2010 –– David Sibley

Variation in juvenal plumage of Red Crossbill

In my last post I mentioned that the juvenal plumage of type 4 and type 2 Red Crossbills seemed to be consistently different, and here are two photos that illustrate the differences.

Juvenile Type 4 Red Crossbill. This individual is typical of the Type 4 crossbills seen, with relatively narrow and pale streaks on [...]

September 21st, 2010 | One comment