What is "freetailed"

Usage examples of "freetailed".

We cut across the scaly land and it seemed to glide a tongue among the bones of mules and greed, and all signs pointed to national monuments, to Organ Pipe, Casa Grande, Saguaro, Chiricahua, Gila, White Sands, loving attempts to embalm the long riddle of the cliff-dwellers, and we moved into evening, crest of the setting sun at our rear window, the tender menace of our land, freetailed bats in flight above the whispering huts of mystics and every unwritten death singing in the hills.