160:). These bats fly as much as 1,000 miles (1,600 km) from Mexico to this cave. After arriving in the cave, the migrant mothers give birth to pups. An astounding 500 pups have been recorded clinging to 1-square-foot (0.093 m) of the cave walls—an ingenious way for keeping warm; the temperature is around 102 °F (39 °C). The city of San Antonio, a local developer, and conservation groups reached agreement on "a $ 20 million deal" in 2014, to ensure that human development would not encroach on the bats, and that the sky near their cave would remain dark at night.
66:
57:
81:
188:
While the
Bracken Cave bat roost is often estimated at 20 million, the true number of bats is unknown due to unreliable counting methods. An animal behavior expert named Leonard Ireland, who researched the bats at Bracken Cave in the 1960s and 1970s, once said the clouds of bats emerging from the
164:
122:, which restores the land to support native vegetation and an abundant variety of wildlife. Bat Conservation International bought the initial 697 acres (282 ha) from the Marbach family in 1992, and has been assisted in preservation efforts by
88:
86:
83:
82:
87:
176:
From March to
October, the bats at Bracken Cave emerge between 6 and 8 p.m. flying southeast on a collision course with bugs such as cotton bollworth moths and army cut-worm moths being pushed away from crops southwest by winds.
85:
333:
180:
The bats consume several tons of insects per night, which according to research conducted in 2006, saves cotton farmers in south central Texas about equivalent to $ 1,118,429 in 2023 a year.
126:. Access to the cave is restricted to protect the habitat of the resident bats. Bat Conservation International offers evening guided tours to the cave to watch the bats emerge from the cave.
84:
408:
290:
360:
418:
256:
111:. The 100-foot (30 m)-wide crescent shaped opening to the cave lies at the bottom of a sinkhole, formed when the roof of the cave collapsed.
334:"Night Flying Missions vs. Mexican Free-Tailed Bats - Twenty million tiny bats living 11 miles from Randolph pose a giant risk to base aircraft"
373:
305:
403:
103:
roost in the cave from March to
October making it the largest known concentration of mammals. The cave is located in southern
211:
119:
423:
21:
230:
282:
393:
135:
388:
100:
260:
123:
156:
The
Bracken Cave is the destination every March or April of over 20,000,000 Mexican free-tailed bats (
398:
104:
413:
142:
series episode "Freaks of the Sky." It was also featured in the first pilot episode of
99:
is the summer home to the largest colony of bats in the world. An estimated 20 million
65:
163:
382:
115:
134:
Bracken Cave has been featured in the media several times since its discovery. The
108:
56:
144:
189:
cave were up to "30 miles (48 km) long and 20 miles (32 km) wide."
36:
23:
114:
The cave and undeveloped 1,521 acres (616 ha) around it are owned by
306:"In Texas, The World's Biggest Bat Colony Is Saved From City Sprawl"
162:
231:"Preserving Bracken Cave and the largest bat colony in the world"
92:
Bats emerging from
Bracken Cave on the evening of 17 June 2017
209:
Grove, Noel (December 1988). "Quietly
Conserving Nature".
327:
325:
167:A Mexican free-tailed bat (Tadarida brasiliensis)
259:. National Geographic Society. Archived from
8:
374:Ann W. Richards Congress Avenue Bridge#Bats
204:
202:
79:
198:
409:Protected areas of Comal County, Texas
138:channel included Bracken Cave in the
7:
293:from the original on June 6, 2021.
14:
363:at Bat Conservation International
74:Bracken Bat Cave by day and night
419:Landforms of Comal County, Texas
237:. Bat Conservation International
64:
55:
16:Cave in Comal County, Texas, US
257:"Amazing Bats of Bracken Cave"
235:Bat Conservation International
120:Bat Conservation International
1:
283:"The Battle for Bracken Cave"
332:Salinas, Alex (2013-10-12).
304:Page, Eileen (2014-11-01).
440:
404:Nature reserves in Texas
136:National Geographic Wild
101:Mexican free-tailed bats
287:The Nature Conservancy
168:
124:The Nature Conservancy
107:, outside the city of
93:
37:29.68715°N 98.352606°W
166:
158:Tadarida brasiliensis
91:
338:Torch - US Air Force
42:29.68715; -98.352606
212:National Geographic
105:Comal County, Texas
33: /
424:Texas Hill Country
169:
94:
184:Unknown bat count
89:
431:
361:Bracken Bat Cave
348:
347:
345:
344:
329:
320:
319:
317:
316:
301:
295:
294:
279:
273:
272:
270:
268:
253:
247:
246:
244:
242:
227:
221:
220:
206:
172:Farming benefits
140:World's Weirdest
90:
68:
59:
48:
47:
45:
44:
43:
38:
34:
31:
30:
29:
26:
439:
438:
434:
433:
432:
430:
429:
428:
394:Limestone caves
379:
378:
370:
357:
352:
351:
342:
340:
331:
330:
323:
314:
312:
303:
302:
298:
281:
280:
276:
266:
264:
263:on May 13, 2010
255:
254:
250:
240:
238:
229:
228:
224:
208:
207:
200:
195:
186:
174:
154:
132:
80:
78:
77:
76:
75:
71:
70:
69:
61:
60:
41:
39:
35:
32:
27:
24:
22:
20:
19:
17:
12:
11:
5:
437:
435:
427:
426:
421:
416:
411:
406:
401:
396:
391:
389:Caves of Texas
381:
380:
377:
376:
369:
366:
365:
364:
356:
355:External links
353:
350:
349:
321:
296:
274:
248:
222:
197:
196:
194:
191:
185:
182:
173:
170:
153:
150:
131:
128:
73:
72:
63:
62:
54:
53:
52:
51:
50:
15:
13:
10:
9:
6:
4:
3:
2:
436:
425:
422:
420:
417:
415:
412:
410:
407:
405:
402:
400:
397:
395:
392:
390:
387:
386:
384:
375:
372:
371:
367:
362:
359:
358:
354:
339:
335:
328:
326:
322:
311:
307:
300:
297:
292:
288:
284:
278:
275:
262:
258:
252:
249:
236:
232:
226:
223:
218:
214:
213:
205:
203:
199:
192:
190:
183:
181:
178:
171:
165:
161:
159:
151:
149:
147:
146:
141:
137:
129:
127:
125:
121:
117:
116:Austin, Texas
112:
110:
106:
102:
98:
67:
58:
49:
46:
341:. Retrieved
337:
313:. Retrieved
309:
299:
286:
277:
265:. Retrieved
261:the original
251:
241:24 September
239:. Retrieved
234:
225:
216:
210:
187:
179:
175:
157:
155:
143:
139:
133:
113:
97:Bracken Cave
96:
95:
18:
109:San Antonio
40: /
399:Wild caves
383:Categories
343:2015-05-17
315:2014-11-03
193:References
145:Dirty Jobs
28:98°21′09″W
25:29°41′14″N
219:(6): 822.
152:Bat haven
414:Tadarida
368:See also
291:Archived
130:In media
267:1 March
118:-based
269:2013
243:2020
310:NPR
217:174
385::
336:.
324:^
308:.
289:.
285:.
233:.
215:.
201:^
148:.
346:.
318:.
271:.
245:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.