As to gulls eating coot chicks. I shot a sequence of that once. Bad pics though as I was shooting from my apartment on the third floor (not counting ground floor) because I just wanted to take some shots for the record.
I have a pair of resident coots in my part of the canal that runs below my apartment. They breed every year. This was in 2017 and they had just one chick left at this point. And the little one kept swimming away from the nest below the deck of an old houseboat, where it was safe.
The story begins here, with the parent on the nest, calling the chick to come back. It didn't. The mute swan is no danger, but there were lesser black-backed gulls and herring gulls flying above. I knew this wouldn't end well. I had my gear ready and was waiting for things to unfold.
#1 Parent on the nest, junior swimming away. He actually swam all the way to the middle of the canal! I was holding my breath...
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Parent goes after him and brings him back, trying to steer him unto the nest. Junior is stubborn and swims away again, parent follows and tries to keep it near the houseboat.
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Next the parent tries to get junior to join him in the tire, where it will be safer.
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Junior doesn't listen and swims on. The parent goes after him.
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All the while I am watching the big gulls above. But when they came down it happened so blazingly fast that I wasn't ready, so shots are far from good.
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The parent immediately attacks but to no avail.
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The gull with junior now gets pursued by the other gulls: mine, mine, mine, so he has to eat the chick on the fly.
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And this is the last seen of the little Coot chick: it's two feet dangling from the gull's mouth...
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