The funniest thing to me about living in south Texas was the people from farther up north getting confused seeing Robins. Down there, they don't mean Spring, they mean it's going to get COLD. Because they migrate through the area on their way South. Some used to stick around my house in Houston almost all winter. Only after they were gone did it mean Spring.
I wonder...do the bats from up this way migrate to your area in the winter? I thought they went to Mexico. Do you have bats that over-winter there?
Hmmm...if I recall, we have them during a portion of the winter. I think they have their babies here and then migrate towards Mexico. Then they return in late spring to midsummer to reproduce again. I'm trying to remember though. I get them mixed up with birds who are here nearly all year. Hence all the bird-watching that goes on in our area.
Then again, I live about 25 minutes from the border. I don't think there is much of a difference between Mexico and here, haha!