Of three species of cave crickets found in Carlsbad Cavern, Ceuthophilus longipes is the most adapted to cave life. It has pale coloration, long slender legs and body, and long antennae. A second species, Ceuthophilus carlsbadensis, shows fewer adaptations, and spends more time in areas close to the Underground Lunchroom, where crumbs are abundant. The crickets also eat natural foods such as bat guano and plant debris washed in by floods. The Ceuthophilus carlsbadensis also likes to eat Ceuthophilus longipes! Ceuthophilus conicadus, the third species of cricket, is in between the other two in its level of cave adaptation. It is less common in Carlsbad Cavern, but abundant in the nearby Spider Cave.
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I wrote and drew this specific post about cave crickets on work time for the U.S. government (mostly), therefore it is in the public domain.