Backyard and Beyond

Every once and a while, an Osprey scouts out Green-Wood’s Sylvan Water, the largest body of water in the cemetery. Just in case.
There certainly are fish in there. This one is entirely too small for an Osprey, but intriguing nonetheless. What is it?
Of course, that fish is perfect for a Kingfisher. This one was spotted earlier in the day than the Osprey. Heard first, actually, which is typical.

Now this one is more Osprey size. It was found in G-W last September. Just like this, at the mouth of the drain. Swam upstream from the bay through the combined sewage-outflow system the city absurdly still uses? I doubt it.
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Worth reading: on Science-ism.