Natural selection at its most powerful winnowed certain finches harshly during a severe drought in 1977. That year, the vegetation withered. Seeds of all kinds were scarce. The small, soft ones ...

So, in a flock of red finches only a few of the birds will show a red head. There are more than one kind ... More than 10 forms of Red Crossbills have been "discovered" recently. They all have ...

There are now at least 13 species of finches on the Galapagos Islands, each filling a different niche on different islands. All of them evolved from one ancestral species, which colonized the ...

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 […] ...