The red-tailed hawk continues to bedevil me. This is not too surprising, since the redtail is the most common raptor here. It is also the most variable in plumage and, it turns out, in habitat. So, it ...

One of the curious things in the world of birds is why most species come in only one color form, while others come in many. We can start with the western tanager. Adult males all look the same. Adult ...