The prospect of free entrance into the National Parks, even for just one day, was too tempting to pass up; so on a Saturday in late August I threw all my backpacking gear together and headed west. First stop was Carlsbad Caverns. I stuck around the visitor’s center until the bat flight at the cavern’s natural entrance. Half a million Brazilian free-tailed bats roost in Carlsbad and, just as they do in Austin, every night they emerge impressively from the cave. At least a hundred people had gathered in the amphitheater, but pictures aren’t allowed at the bat flight (as a precaution for the bats) which was pretty relaxing. Free-tails are just one of thirteen bat species in the Carlsbad area.

            After the bat flight I drove out a dirt road to the trailhead for Rattlesnake Canyon, spotting mule deer, black-tailed jackrabbits, and common poorwills along the way. I hiked down by the light of my headlamp, and Sunday morning it was remarkable to see the slopes of the canyon around me that I just couldn’t see the night before. A walk before breakfast turned up a javelina that was very surprised to see me and a lot of canyon wrens. After hiking out, it was down to Guadalupe Mountains National Park headquarters to snap a picture with El Capitan…..from below, unfortunately, as I didn’t have enough time to climb it this time.

Muly

            I started down the Bush Mountain Trail at around midafternoon. Just half a mile down trail the valley was a flurry of bird activity, with a whole family of phainopeplas, rock wrens, and rufous-crowned sparrows to name a few. Bush Mountain treats to spectacular views of the grassy mountains around you and the Guadalupe Mountains stretching north. At the highest point of the trail I could look into both Dog Canyon that I’d left behind and West Dog Canyon. Markus primitive campground was empty except for me, as all the trails had been that day. As the sun disappeared and the stars became visible, I was treated to the complete stillness of the wilderness.

            The next day I got up two hours before dawn and started hiking out. Two hundred fifty feet up I stopped to make breakfast and watch the sunrise. It was an easy downhill hike back to my car and the wildlife showed up. A Pygmy short-horned lizard was warming up on the trail and I added kestrels, black-chinned sparrows, and a black-headed grosbeak to the bird list. Eventually I made back to the car and headed home. It was a quick trip, and featured fewer trees than I imagined, but Guadalupe Mountains is beautiful from any angle you look at it.

Pygmy short-horned lizard

Free-tailed pup trying on his scary face for Halloween.  We’re not buying it – still way cute!
Best Insta-replies?
From pink_1101floyd “Fire the lasers!”
From 747mandi “Game face!”

Austin bat talks presentations outreach education programs Congress Avenue Bridge bats


Hours old new-born Mexican free-tailed bat pup.

The face that gets hundreds of millions of Central Texas mums out of the roost each evening to go to work in the agricultural fields.

Check out that cute little nursing nose; like all mammals, makes it easier to nurse and makes the pups even more irresistable.

newborn Tabr use this one


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Yes she has teeth, but she’s not snarling, just echolocating, to see in the dark and to find one of the juicy moths or beetles flying about the enclosure.  After parsing many call sequences from that evening, we analyzed this one call out of a call sequence we think is hers. Many of our local species, including yellows are not in standard call libraries, but this call is similar to others we have recorded from northern yellows. We hope to get a voucher call when she is released soon.  Voucher calls are recorded from a hand-released bat when no others are flying in the immediate vicinity.  They form the basis of call libraries and that is what we’ll use to develop our own.

Lasiurus intermedius28Feb2016

 


northern yellow and velifer

Northern yellow bats are awesome creatures.  At 28.3 grams, she is three times the weight of the velifer in the upper right of the photo.  Check out those beautiful broad wings.   We’re so lucky to have them in Austin!  Let’s help them out by not trimming the skirt of dead fronds under the green crown of our palm trees.  They have evolved to blend in perfectly with that habitat.  They feel so secure there, that they are slow to awaken from torpor, and often plummet to the ground when the dead fronds are trimmed.


Our over-winter evening bat guests have been shredding the flight cage the last few nights.  First clear night we’ll wait till the flyers are hunting in the flight cage, then we’ll take the non-volants out of the bat box and put them in a pup tent.  The next morning we’ll have only flyers in the box and we can gather them for release.  These are very cool little bats!

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