Representation of Aphonopelma burrows in different habitats across the United States. A–C a typical “scrape” (burrow under rock) of A. hentzi in rocky habitat across their distribution D–E a turreted mound around the burrow of A. icenoglei (also A. atomicum, A. mojave, and A. prenticei) F the distinct crescent mound burrow of A. paloma G–I typical free-standing burrows of A. chalcodes, A. eutylenum, A. iodius, or A. johnnycashi in desert, grassland, or rocky habitats.