I learned why woodpeckers would bother drilling on glass or metal. It’s a way to mark territory–or make their presence known. This makes a lot of sense; it’s only been a few months since I heard the glass tapping and that’s about the time I noticed many more woodpeckers around here. Tapping on glass is incredibly loud (I’ve heard it coming from a neighboring building) and it reverberates. What a way to “notify” other woodpeckers in the area.
I also discovered some interesting facts. I had no idea that these birds have a long, sticky tongue they use to extract insects, spider eggs, and insect larva from the holes they drill in trees. The Northern Flicker, a type of woodpecker, actually spends much of its time on the ground collecting ants with that sticky tongue.
Woodpeckers have feet designed to allow them to walk up and down tree trunks. Unlike other birds, they have two toe claws in the front an two in the back to prevent them from tipping back or falling as they drill into trees. They use their stiff tail feathers as further support and have muscles in their necks that serve as shock absorbers as they hammer into trees and branches. There is even a sap-sucking woodpecker which drills into a tree and extracts the sap, instead of feeding on insects. This type of woodpecker actually damages, even kills, trees.
Incidently, what I thought were red-headed woodpeckers are probably either ivory-billed or pileated woodpeckers. All those I’ve seen have had a cap of red on the crown; however, this is common with most species, except the flicker. The red-headed woodpecker has a fully red head and neck. I’ve definitely seen those when I lived in Michigan, but thought they were the males while the red-capped birds where the females.
So, now I’m eager to observe the next woodpeckers as they hammer out a meal. And I’m gathering more information about these birds. Perhaps I have an article based on this “wondering.” Certainly I have the seeds (and a bit of the research done) to begin a children’s book on these interesting birds.