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The Distribution And Ecology Of The Hispid And Least Cotton Rat (Genus Sigmodon) In New Mexico, John S. Mohlhenrich
The Distribution And Ecology Of The Hispid And Least Cotton Rat (Genus Sigmodon) In New Mexico, John S. Mohlhenrich
Biology ETDs
Two species of cotton rats, Sigmodon minimus Mearns (least cotton rat) and S. hispidus Baird (hispid cotton rat), occur in the Rio Grande Valley of New Mexico. The northernmost published record-station for S. hispidus is near Scorro, Scorro County ( Bailey, 1931: 167), and that S. minimus is near Isleta, Bernalillo County (Ivey, 1947: 498 and map). When recent field work by the author revealed the presence of both species in the Rio Grande Valley north of these published record-stations the problem arose whether the range extensions were the result of a recent northward extension of the range of the …