A Study of Pine Warblers

This winter we have been hosts to three very distinct pine warblers. And they are all coming to the feeder station we have out. This year I have a hopper with mixed seeds, a small dish that usually has dried mealworms, and recently I have added back the Bark Butter feeder. The Bark Butter feeder is a fallen limb that I drilled 1" holes all the way through. It used to hang from a pine branch that I could reach with a long stick. This offered good protection from squirrels and other mammals. But then that branch fell in a storm and there isn't anything else that is within good reach that would also offer mammal protection. So it had been in the shed for a couple of seasons. 

This year we have been getting a lot of activity at the feeder including a family or two of bluebirds and the western tanager visitor talked about in my last post. That, plus being home most days now that I'm retired, means I can better keep up with the full suite of feeders. 

Among the many visitors are the pine warblers. We have pine warblers in the yard year-round and they would occasionally come to the feeders. But this year they are being regular visitors and with the distinct plumages, we can readily keep track of them. It also has been fun to watch their interactions. One day I had the camera out and took a lot of pictures. Here are some of the highlights including the plumage variations and some of their interactions.

This is the palest of the pine warblers. On the front (see image below), there is only a slight hint of yellow. When we first saw it from the front, we were thinking it might be something like an orange-crowned warbler. But the wing bars and overall behavior make it clearly a pine warbler. 

Pale pine warbler on Bark Butter feeder

Palest pine warbler on the mealworm feeder to the right

This is the brightest and the middle pine warblers both on the feeder pole. A downy woodpecker comes in and flushes the middle one.

The brightest and middle pine warbler both on the feeder

A downy flushes one off

The brightest has very strong, distinct streaking along its sides. Very pretty.

Brightest pine warbler showing streaking on its sides

The warblers like the mealworm feeder too. But it is small enough that they usually don't share. First we have the brightest pine warbler displacing the palest. And then the palest coming back but failing to displace a bluebird.

Palest pine warbler leaving as the brightest comes in to the feeder

Pine warbler approaching bluebird already on the feeder

And not being successful in displacing the bluebird

And finally, the palest attempting to approach the Bark Butter feeder that the brightest is defending

While the palest seemed to have a rough time of it accessing the feeders the day I had the camera out, that does not seem to be a regular pattern. Just a little run of bad luck.

It appears that we have two mixed flocks with different makeups of species and a few times a day, they arrive at the same time. Or maybe it is a large one that sometimes splits into two?? The middle and brightest often travel together while the paler one is the lone pine warbler in its smaller group. The groups have different numbers of chickadees and bluebirds as well. When they get together there doesn't seem like there is much fighting so that's good.

'Til next time ...