Bark Birds Big and Small

by Carl Strang

As the season progresses, numbers of passing migrant birds at St. James Farm Forest Preserve have diminished. Residents, augmented by winter additions from the North, increasingly dominate the avian communities. Prominent among these hangers-on are the birds that forage on tree bark. Downy, hairy and red-bellied woodpeckers are year-round residents covering three body sizes and the particular foraging advantages of each. Nuthatches are still smaller, songbirds that have the ability to crawl sideways or upside down on the tree bark, finding hiding insects the woodpeckers might miss. Red-breasted nuthatches have become common in the coniferous forest this fall, while resident white-breasted nuthatches are scattered through the deciduous woodlands.

On Saturday this white-breasted nuthatch caught a harvestman that did not find a sufficiently secure bark crevice.

On Saturday this white-breasted nuthatch caught a harvestman that did not find a sufficiently secure bark crevice.

While photographing the nuthatch I heard in the distance a loud call which was entirely unexpected. Eventually my monitoring route took me into that part of the forest, and the calling resumed close by.

A pileated woodpecker!

A pileated woodpecker!

This huge bird is not one we encounter very often in DuPage County. I know of two resident pairs in the eastern half of the county. Others occasionally wander through, and this male at St. James Farm qualifies as one such traveler.

Continuing to call frequently, he actually flew closer to me. Here he cries from just above.

Continuing to call frequently, he actually flew closer to me. Here he cries from just above.

On Sunday I was in a different part of the same forest, but it was calm. I did not hear a pileated calling in the distance. I hope he moved on, rather than becoming dinner that night for the great horned owl I saw being harassed by crows not far from the woodpecker’s attention-drawing display. On the other hand, it would be nice if the pileated decided to hang around for the winter. As the largest block of old trees in the western half of DuPage County, the forest at St. James Farm is the place most likely to host our largest woodpecker species. Pileateds need lots of big old trees harboring carpenter ant colonies. In any case this was exciting, the highlight to date of my young monitoring program at St. James Farm.

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