Hungry Bats

Two Vampire bats are in a cave, both very hungry. The first bat goes out looking for some food. He comes back later with nothing. The second bat tries not long afterwords. 5 minutes later he returns, blood all over his face! "Wow!" said the first bat "You must've had a big meal, where did you get that?" "Well, can you see that large redwood over there?" "Yes" replies the first bat. "Well I bloody well didn't."