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Mary Warwick, wildlife director for the Houston Humane Society, holds a Mexican free-tailed bat as it recovers from last week's freeze on Tuesday, Dec. 27, 2022 in Houston. The freezing temperatures caused the bats to go into hypothermic shock, lose their grip on their habitat and fall to the ground. Over 1500 bats were rescued from the Waugh Street Bridge and in Pearland since Friday. The public is welcome to watch them release almost 700 of bats on Wednesday at 5:30 at Waugh Street Bridge in Houston. (Elizabeth Conley/Houston Chronicle via AP)
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Bats plunge to ground in cold; saved by incubators, fluids


Some 1,600 bats found a temporary home this week in the attic of a Houston Humane Society director, but it wasn’t because they made it their roost.


It was a temporary recovery space for the flying mammals after they lost their grip and plunged to the pavement after going into hypothermic shock during the city’s recent cold snap.

On Wednesday, over 1,500 will be released back to their habitats — two Houston-area bridges — after wildlife rescuers scooped them up and saved them by administering fluids and keeping them warm in incubators.

Mary Warwick, the wildlife director at the Houston Humane Society, said she was out doing holiday shopping when the freezing winds reminded her that she hadn’t heard how the bats were doing in the unusually cold temperatures for the region. So she drove to the bridge where over 100 bats looked to be dead as they lay frozen on the ground.

But during her 40-minute drive home, Warwick said they began to come back to life, chirping and moving around in a box where she collected them and placed them on her heated passenger seat for warmth. She put the bats in incubators and returned to the bridge twice a day to collect more.

Two days later, she got a call about more than 900 bats rescued from a bridge in nearby Pearland, Texas. On the third and fourth day, more people showed up to rescue bats from the Waugh Bridge in Houston, and a coordinated transportation effort was set up to get the bats to Warwick.

Warwick said each of the bats were warmed in an incubator until their body temperature rose and then hydrated through fluids administered to them under their skin.

After reaching out to other bat rehabilitators, Warwick said it was too many for any one person to feed and care for and the society’s current facilities did not have the necessary space, so they put them in her attic where they were separated by colony in dog kennels and able to reach a state of hibernation that did not require them to eat.

“As soon as I wake up in the morning I wonder: ‘How are they doing, I need to go see them,’ ” Warwick said.

Now, nearly 700 bats are scheduled to be set back in the wild Wednesday at the Waugh Bridge and about 850 at the bridge in Pearland as temperatures in the region are warming. She said over 100 bats died due to the cold, some because the fall itself — ranging 15-30 feet — from the bridges killed them; 56 are recovering at the Bat World sanctuary; and 20 will stay with Warwick a bit longer.

  • Lissette Salazar injects warm fluid into a Mexican free-tailed bat at Houston Humane Society TWRC Wildlife Center on Tuesday, Dec. 27, 2022 in Houston. Over 1500 bats were rescued from the Waugh Street Bridge and in Pearland since Friday. The center warmed up the bats in an incubator, then inject them with fluid to keep them from dehydrating and starving. (Elizabeth Conley/Houston Chronicle via AP)
  • A bat stretches out its wings after getting some fluids at the Houston Humane Society TWRC Wildlife Center on Tuesday, Dec. 27, 2022 in Houston. Over 1500 bats were rescued from the Waugh Street Bridge and in Pearland since last Friday. The center warmed up the bats in an incubator, then inject them with fluid to keep them from dehydrating and starving. (Elizabeth Conley/Houston Chronicle via AP)
  • Mary Warwick, wildlife director for the Houston Humane Society, talks about the Mexican free-tailed bat as some recover in incubators at the facility from last week's freeze on Tuesday, Dec. 27, 2022 in Houston. The freezing temperatures caused the bats to go into hypothermic shock, lose their grip on their habitat and fall to the ground. (Elizabeth Conley/Houston Chronicle via AP)
  • Mexican free-tailed bats huddle in an incubator as they recover from last week's freeze on Tuesday, Dec. 27, 2022 in Houston. The freezing temperatures caused the bats to go into hypothermic shock, lose their grip on their habitat and fall to the ground. Over 1500 bats were rescued from the Waugh Street Bridge and in Pearland since last Friday. (Elizabeth Conley/Houston Chronicle via AP)
  • A Mexican free-tailed bats hangs out in an incubator after getting some fluids in it as it recovers from last week's freeze on Tuesday, Dec. 27, 2022 in Houston. The freezing temperatures caused the bats to go into hypothermic shock, lose their grip on their habitat and fall to the ground. Over 1500 bats were rescued from the Waugh Street Bridge and in Pearland since last Friday. (Elizabeth Conley/Houston Chronicle via AP)

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The humane society is now working to raise money for facility upgrades that would include a bat room, Warwick added. Next month, Warwick — the only person who rehabilitates bats in Houston — said the society’s entire animal rehabilitation team will be vaccinated against rabies and trained in bat rehabilitation as they prepare to move into a larger facility with a dedicated bat room.

“That would really help in these situations where we continue to see these strange weather patterns come through,” she said. “We could really use more space to rehabilitate the bats.”

Houston reached unusually frigid temperatures last week as an Arctic blast pushed across much of the country. Blizzard conditions from that same storm system are blamed for more than 30 deaths in the Buffalo, New York-area.

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Carrie Antlfinger and Acacia Coronado via Associated Press



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