Huge colony more than 1000 individuals
A large roost in the cellar of the Dam.
Cave photography revealed a surprise bat! It was all by itself, and very small, like a dwarf hamster. It had long ears. One more photo forthcoming, showing the back and ears.
My biggest surprise of the day! I didn't even see it against the mud until I stepped too close and it hissed/squealed at me. I'm guessing it somehow ended up in the pond and managed to swim to shore, but then it ended up exhausted and unable to go any farther.
Bats resting on a leaf
Observed guano under concrete structure in riparian area.
San Diego County, California
Observed hanging low on rock face.
Bats are mammals of the order Chiroptera (/kaɪˈrɒptərə/; from the Greek χείρ - cheir, "hand" and πτερόν - pteron, "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, can only glide for short distances. Bats do not flap their entire forelimbs, as birds do, but instead flap their spread-out digits, which are...