Hundreds of bats rescued from the winter storm that struck the US over the past week were finally able to return to their homes in Texas last night.Mexican Free-tailed bats started dropping from their roosts as temperatures dipped below freezingMexican Free-tailed bats started dropping from their roosts as temperatures dipped below freezing on the evening of December 22nd, according to the Houston Humane Society.Weighing in at around half an ounce, the critters don’t have much body fat to keep themselves warm.Its Texas Wildlife Rehabilitation Coalition (TWRC) is fundraising for a new building, which is supposed to include “a dedicated bat room.”“That would really help with these situations as we continue to see these strange weather patterns come through,” Mary Warwick, HHS TWRC Wildlife Director, said in a video posted to Facebook.The Mexican free-tailed bat is the most common kind of bat fluttering around Texas, and is the official “state flying mammal.” They typically spend winters in Mexico, but will migrate North to give birth and raise their young in big “maternity colonies” by early spring."