Merriam’s pocket mouse survives dry country by carrying its harvest home in fur-lined cheek pouches, moving seeds without wetting them before storing everything underground. New Mexico’s records are genuinely thin, though. A percentile rank of 15.2 puts this among the rarest-documented mammals in the state’s whole record.
Carlsbad Caverns National Park supplies the state’s only tracked location with a confirmed count, just a single record, alongside White Sands National Park and Organ Mountains-Desert Peaks National Monument as other named localities. All three sit in the Chihuahuan Desert grassland and gypsum country this small nocturnal rodent favors.
Nine dated records exist, five of them in May. That’s too small a sample to call a real seasonal pattern, more likely a snapshot of when a survey happened to run through the area than any true springtime surge in mice.
Full species profile
