This morning these two birds collided with a second-story window and fell to the ground dead: I think the larger, more colorful one first, followed a second later by the smaller one.
What are they?
At the time the sun was reflecting almost straight back from the window. Is sun reflection...
I live in a development in SE PA surrounded by mature trees.
Last October a woodpecker took an intense daily interest in this one second-story corner of my house that had recently been renovated with PVC boards. The property manager tried a number of things to deter it, like hanging out strips...
Some birds have striking sexual dimorphisms, while others are practically indistinguishable by gender. Is there a clear delineation of the species that do and do not have sexual dimorphism? E.g., do they all happen to fall into the same families? Or are there other characteristics that seem...
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