Q: I’ve been watching a flicker family growing up in a tree on my property. The parents bring food and the youngsters stick their heads out of the nest hole to eat it. Out of nowhere and in the blink of an eye recently, a broad-winged hawk swooped in and grabbed one of the young flickers. Afterward, the parents kept pushing the surviving chick back into the nest hole. It all happened so fast I didn’t get a photo.
A: What a tragic tale, and I hadn’t known that broad-wings would engage in such behavior, more frequently associated with bird-eating accipiters, like Cooper’s hawks. Broad-wings more often focus on catching rodents. Let’s hope that the remaining young flicker listens to its parents, because the hawk will likely try again.
Lawn mower meals
Q: Whenever I mow the lawn, I have a number of robins patiently waiting on my fence to see what insects the mowing reveals. I’m now using a quiet electric mower, and wonder if they’re responding to the sound of the mower or the visual stimulus telling them that “dinner is served.”
A: That’s an excellent observation, and I’m betting that the robins are happy that you’re using a quieter mower, but their interest is in whatever insects the mower turns up. This is a fascinating example of birds’ intelligence and ability to learn.
Birds in the rain
Q: It’s been raining so much this summer, leading me to wonder how heavy rain and/or high winds affect hummingbirds’ ability to fly. And more generally, how these affect other birds.
A: That’s an excellent question, and it inspired me to do some research. We’ve all seen that in a heavy downpour, birds tend to disappear, choosing to shelter in dense foliage, among thick branches or under an overhang or other structure until the storm passes. They’re not so much avoiding getting wet, since feathers protect them, up to a point, but it’s simply more difficult to fly in the rain: flight feathers get wet and weight a bird down. Most birds choose not to fly in the rain, unless they’re very hungry. Hummingbirds can still fly in light rain, but their small size and weight mean they are easily buffeted by high winds.
Who’s debarking a maple?
Q: I have found a considerable amount of bark under my maple tree twice this month, and I’m guessing that squirrels are responsible. I want to keep this tree healthy and need some advice on how to prevent this from happening again.
A: This doesn’t sound like squirrels are the bark-strippers, but it very much does sound like the result of woodpecker activity, especially by a pileated woodpecker. It’s possible that your maple has some kind of insect infestation, and a woodpecker wants to reach the beetles or grubs beneath the bark. Sorry to say, I know of no way to prevent a persistent woodpecker from chipping off bark in its pursuit of a meal. It might be a good idea to call for a visit by an arborist to diagnose your tree’s health.