So this week I took the granddaughter to Hogle Zoo, which has substituted Lego animals for real animals (not kidding) since everything's under construction.
Anyway, one of the Lego animals was a snake. The docent explained that just like the rabbits in Australia, a certain species of snake (I can't remember which one) accidentally introduced to a new environment (I can't remember where) went crazy and ate all the birds. And so now those birds are extinct.
"And now pet cats are doing the same thing," the docent told us, "WHICH IS WHY YOU SHOULD NEVER LET YOUR CAT OUTSIDE."
Which is probably good, responsible advice. But seriously. I have to worry about dead birds now, too?