I've been called by people because birds are pooping on their cars at traffic lights, or because squirrels are looking in their windows. My favorite is when someone will call and report that a duck, that migrates every year for thousands of miles, is "lost and confused" in some one's yard. Apparently, flying cross country is one thing... but a suburban neighborhood is just too damned confusing to navigate through!
We get LOTS of snake calls in the town where I work. Fortunately, venomous snakes are really rare in populated areas where I live. About the only poisonous snakes here are Water Moccasins and the occasional Copperhead. In fifteen years of Animal Control, I've only come across 2 actual poisonous snakes. The rest are largely rat snakes, bull snakes, and water snakes.
Here's a vid I shot last week: