New Mexico sits near the southern edge of the American ermine’s range, and the numbers reflect it: just 47 total records, combined from GBIF and iNaturalist, clustered loosely around Bosque del Apache National Wildlife Refuge, the Rio Grande corridor, and Bitter Lake National Wildlife Refuge.
This weasel is a bold hunter for its size, sometimes taking rodents or rabbits considerably larger than itself. No NatureServe rank is on file for New Mexico, so there’s no formal read on how secure the state’s population is, only a count of records that lands in the rare bucket among mammals tracked here.
Reports bunch up from July through September, when it’s warm and outdoor activity in these refuges is highest. That’s a pattern in when people were out looking, not proof the ermine is scarcer the rest of the year.
Full species profile
