Abstract
In January 1969, Davis found nests within a cave he was exploring on Mariscal Mountain, Big Bend National Park, Brewster County, Texas. On 27 May, the authors visited the area and found 13 Cave Swallows (Petrochelidon fulva) and four or five Cliff Swallows (P. pyrrhonota) flying in a mixed flock outside the cave entrance. A total of 18 Cave Swallow nests was located within the cave, 60-70 ft back from the entrance; two nests contained young birds and a third contained four eggs. All of the nests were located along cracks within the domed ceiling 6-8 ft above the floor. Several discarded egg shells were collected and the nests were photographed. Two active Cliff Swallow nests were found at the cave entrance. A second cave nearby contained several inactive Cave Swallow nests in its twilight section. The caves were examined again on 17 July by David Easterla (pers. comm.), who found 20-25 birds at the caves and three more active nests in the first cave.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
