Last month we had two predatory birds visit our yard in Leavenworth, Kansas, USA. While they were thrilling to observe, they gave me a bit of the shivers. Cooper's Hawk, and Sharp-shinned Hawk, are both accipiters, well-known for ambushing songbirds at feeders, much to the consternation of birders. These raptors don't give up easily, either, as I learned from the two I witnessed.
On December 8, at about 12:15 PM, I got up abruptly from my chair in the living room, having remembered a household chore I needed to do. Glancing up, I saw, through the open blinds over our backdoor windows, the largest bird I had ever seen in our backyard. It was an adult Cooper's Hawk (COHA if you are a fan of banding codes), perched atop the shepherd's hook from which our feeders are suspended. Since I was startled myself, I fully expected it to fly off immediately, but went to get my camera anyway.
The bird did indeed launch itself a short time later, but merely glided to the back section of our fence, where it came to rest once again. I was delighted to get more opportunities for photos from between the slats of the blind, through the entirely too-dirty windows.
Three minutes later, the hawk flew to another section of the fence, closer still. A minute later, it returned to its previous spot on the rear section of fence. From there it moved to the fencepost that abuts our detached garage, and beneath a non-functional light fixture. We need to have that looked at, but I digress. The bird was staring intently at the brush pile I erected to offer cover to songbirds for situations just like this one.
At twelve-thirty, the Cooper's Hawk flew onto the brush pile itself, perching low, on one of the more exposed limbs. A minute later it was back atop the back section of fence. A moment later it was on the side fence again. What it did next was unexpected.
The hawk flew down to the ground into our backyard. It proceded to skulk around our forty gallon, prefabricated pond, and crawl through the dense, weedy thicket that is our vague attempt at a pollinator garden.
At this point, I became unsure whether I was watching a hawk, a Greater Roadrunner, or even a weasel. The alert, thorough searching of this predator was truly remarkable.
At twelve thirty-eight, the hawk returned to the brush pile. This time, it dove right in, scouring every inch of the labyrinth for potential prey. Creepy. Literally. Another minute or two later, the hawk flew away for good, headed in the direction of the federal penitentiary, an embarrassing block-and-a-half to the north, beyond the back section of our fence.
The whole encounter seemed to last much longer than the twenty or so minutes between the time stamps on my first and last photo. I would have expected the hawk to conceal itself in the brush pile, and simply wait for the House Sparrows, House Finches, Dark-eyed Juncos, and maybe other birds, to return to the feeder, unaware of the potential danger. Not so. This was active hunting, and it took me completely by surprise.
On December 15, just before one o'clock PM, I stepped out the backdoor to top off the feeder. A bird about the size of a dove, maybe slightly larger, rocketed out of the brush pile, nearly giving me a heart attack. Miraculously, I could tell immediately that it was another accipiter, but definitely not the Cooper's Hawk from the previous week.
I was able to follow the flight of this smaller raptor and, amazingly, it came to alight atop a neighbor's fence about thirty yards away or so. I went back inside the house to retrieve my camera.
Even more surprisingly, the hawk was still there when I returned. I was too excited, and too vertically-challenged, to get a sharp (no pun intended) photo of what I suspected was a Sharp-shinned Hawk (SSHA banding code), over three layers of fences, at distance, but I tried anyway.
Separating Cooper's Hawks from Sharp-shinned Hawks is a challenging exercise even for seasoned birders. You caannot use size as a reliable difference because there is overlap between a small male Cooper's Hawk and a large female Sharpie. Both species are clad in nearly identical colors, though the back of the neck is colored the same as the top of the head and back of the bird in Sharp-shinned Hawk. The back of the neck is vaguely paler in Cooper's Hawk, giving it a black-capped appearance.
In my limited experience, I have noted that sharpies, when perched, look like they have no neck at all, the head tapering immediately into the rest of the body. Their beaks are very short and comparatively delicate compared to a Cooper's Hawk.
More experienced birders note that the eyes of a Sharp-shinned Hawk are larger in proportion to the head, such that they appear to be "bulging." The tip of the tail in a sharpie is straight-edged, whereas it is rounded in a Cooper's Hawk. This last trait can be unreliable, though, or at least difficult to properly perceive.
I wish I had not flushed the sharpie, and been able to observe whether it behaved similarly to the Cooper's Hawk. Maybe I can train my brain to recall these encounters before I abruptly and absent-mindedly throw open the back door again. It could be months, if not a year or more, before we get another visit, though. I suspect the hunting territory of these hawks encompasses a pretty large area.
You are invited to share your own stories of accipiter encounters in the comments here. I moderate input at least once per week. I will try and not be envious if you have seen a Northern Goshawk on your property.
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