This is the time of year when the warblers are a sea of yellow and gray around here. The two most prolific of these birds at my place are the Yellow-rumped Warbler (Setophaga coronata) and the Pine Warbler (Setophaga pinus).
The diet of the Yellow-rumped Warbler consists of mostly insects including caterpillars and other insect larvae, beetles, weevils, ants, scale, aphids, grasshoppers, caddisflies, craneflies, and gnats, as well as spiders. Quite a menu variety. They also eat spruce budworm, a serious forest pest concern.
It’s interesting to watch the Yellow-rumped Warbler feed. They flutter and catch insects on the wing and they also flutter next to tall grasses to snag seeds. It reminds me of how a hummingbird hovers.
Yellow-rumped Warblers enjoy fruits, particularly bayberry a.k.a. wax myrtle, which “their digestive systems are uniquely suited among warblers to digest”. This gives them a greater northern winter range. This shrub is the most prolific in my garden.
Other commonly eaten fruits and seed include:
In my garden
|Juniper berries||√||Red Cedar (Juniperus virginiana)|
|Poison ivy||√||Toxicodendron radicans|
|Virginia creeper||√||Parthenocissus quinquefolia|
|Seeds from grasses||√||Bluestem (Andropogon spp.)|
|Goldenrod seeds||√||Solidago spp.|
This probably explains their vast numbers at my place. They will use feeders but nutrition from actual plants is a better choice since the food isn’t chemically treated to control insect pests during production.
When I added the red cedar I hoped that the Yellow-rumped warblers, who build nests in conifers, would be enticed. They build with twigs, rootlets and grass, lined with hair and feathers. Unfortunately I didn’t realize that in my area they are non-breeding winter residents. Still, the cedar will feed them and many other bird species make use of this pretty native tree. I’ll just have to hope that someone in their breeding range will share their encounter details.
One thing I noticed is that the colors of “my butterbutts” aren’t as vivid as some shown on birding websites where they can have sharp black markings. Apparently during the winter they are a little more drab, but they will always have that bright yellow tail thing going which they flash often when standing still, spying for insects.
Ok, the Pine Warbler isn’t called a Butterhead; I’m just making that up. They are pudgy birds and they do have bright yellow HEADS, so if the yellow RUMPED warbler…well, you get my drift.
Aptly named since they spend much of their time in the pine trees, they also come down to find insects in the grasses and they do enjoy seed, and among warblers they are notorious seed eaters…especially pine.
Recently they have been spending a lot of time in the dead parts of the Spanish Needles (Bidens alba) munching away on the spent seeds. Still, they mostly eat caterpillars and other insects including beetles, grasshoppers, ants, bees, flies, cockroach eggs, and spiders. Again, they will readily come to feeders, but natural foods are a better source of nutrition than commercial birdseed.
These birds nest high atop pine trees. I’ve yet to see an actual nest but I do take out the field glasses and scan the trees during nesting season since I am hopeful that they will nest, given the amount of time they spend around my garden which has those tall pines. I’m still not clear how any type of nest could stay up in a pine since they sway so much in the wind. These birds must have access to super glue.
The Pine warbler is quite melodious and I get so much enjoyment hearing them from high in the treetops. A bird that is fun to watch, beautiful and worth setting up habitat for.
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