Why Do Bird Types Show Up at My Feeders in Twos?

Interesting that I haven't been getting new species at my bird feeder one at a time - they've shown up in twos.

The tufted titmouse & Carolina chickadee made sense - similar habitats, similar feeding strategy, safety in numbers (especially given the toughs that hang out around here).

But this week two very different birds showed up on the same day. A White-breasted Nuthatch flew up to the suet feeder:

Then a Dark-eyed Junco came hopping along looking for stray seeds from from my sunflower seed feeder:

While I've seen rabbits, hawks, and even a bald eagle in this area, I hear I haven't met some of the most interesting neighbors. A National Wildlife Federation coworker who lives in Arlington's Madison Manor tells me he regularly sees foxes ... and on trash night, has heard a coyote yipping in the darkness.

Read all my backyard birding posts under my birdwatching tag.