Herons feed at night, and will also drop a LMB on the bank and regrip and swallow. GBH will also fight off other GBH that show up, and I've seen them chase trespassers for several hundred yards. For some reason, they don't chase off white egrets.
Night time is when GBH gorge on bull frogs. It's taken almost 2 years to get them back, and I assume they'll get whacked again this summer.
