lol, it seems that ospreys will need to go into serious fishing business to keep them with a good GPS supply

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Yes, I've heard of the bald eagles stealing habits. They'd badger the osprey by swooping in low, then zoom upwards. Finally the osprey, having had enough, flips over, usually with talons outstretched which causes the fish to hang loosely or drop, and then the
majestic eagle zooms in to catch the falling fish or pluck the outstretched fish.