The juvenile/ immature birds are paler and more streaked than the females. In flight siskins look yellow/black and fly in a fast, undulating manner. Their voice includes a variable twitter ...

Cassin’s finches join mixed siskin, crossbill and grosbeak flocks in winter. During spring, Cassin’s are known to feast heavily on aspen buds, but as the summer nesting season begins ...

I am seeing just a few purple finches at the feeders now. Last year, over a dozen were here on many days in January. Some may migrate to the south […] ...

Flashes of yellow on the wings and tails of adults add some flair to their look, but all in all, pinus siskins are definitely ...

The paper M. Gazda et al., “A genetic mechanism for sexual dichromatism in birds,” Science, 368:1270–74, 2020. Male red siskins (Spinus cucullatus), a species of finch, flaunt orange-red bellies and ...

It’s cold outside! It’s been too cold for so many of our regular outdoor activities. But we have enjoyed the birds in ...