Wild Conservation – A Houston Zoo Blog

Cullen with bat that lives in the roof of the guest housing at Painted Dog Conservation

Cullen Gieslman is a Houston Zoo conservation board member.  She has been studying bats for quite some time and volunteered to accompany Conservation Programs Manager, Rachel Rommel to Painted Dog Conservation in Zimbabwe to educate staff there about bats.  Painted Dog Conservation’s (PDC) education program for the local communities focuses on the eco-system.  PDC was very eager to have Rachel  and Cullen contribute an amphibian and bat component to this program.   Enjoy Cullen’s bat update from PDC in Zimbabwe.

Cullen weighing bat

This is a brief bat update and photos that Rachel took of me and the bats living in our house. It’s really the only batting we have done besides wandering around with bat detectors. We’ll try to get more photos with the camp kids when we show them the bats next week. The housing for visiting scientists at Painted Dog Conservation in Zimbabwe shelters a large colony of bats that we hear squeaking and moving about day and night. To find out what species we are cohabitating with, we devised a plan to capture a few.

Rachel, Cullen and Greg Mist-netting for bats

We taped a very short mist net (2.6 meters long and about 2.6 meters high) to some poles and, once it got dark, we observed the direction the bats were taking as they flew out of their roost. We quickly positioned the net right in their path and, after intercepting four, swung the net out of their way because we would only need a few to confirm species. I gingerly extracted each from the net and placed it in its own cloth holding bag. I could tell from the shape of the face and ears and presence of a free tail extending beyond the tail membrane more than one-third of its length that we had captured a species of free-tailed bat in the family Molossidae.

Cullen measuring bat

I then consulted Bats of Southern and Central Africa to determine the species based first on forearm measurement and then on description. Our cohabitants turn out to be Mops midas, or Midas free-tailed bat, a large species (forearm = 61 mm, mass = 45 g) associated with hot, low-lying savanna and woodlands in southern Africa. We captured two lactating females, one pregnant female, and one scrotal male suggesting that our house is being used as a maternity roost and that the noise we hear during the night are mothers coming back to feed their young.

Adults of this species eat insects, mainly beetles, which are very abundant in the area. After measuring and weighing our captives, we released them to go about their nightly forays.

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