A descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees.
Edgar Alexander Mearns, Published April 13, 1907
View Mammals of the Mexican boundary of the United States, Mearns 1907 here (43mb)
From July 1998 to July 2000 we collected locality information and habitat associations for 36 records of the Endangered ocelot Leopardus pardalis in the Mexican State of Sonora. Twenty-seven (75%) of the records for which we could determine the biotic community association were associated with tropical and subtropical habitats, namely subtropical thornscrub, tropical deciduous forest or tropical thornscrub.
Measurements taken on the skull of a bear shot in northern Sonora, Mexico, in 1976 revealed that the skull is from a brown bear (Ursus arctos). The skull appears to be that of a juvenile (sex unknown) and, to our knowledge, represents only the fourth confirmed record of a brown bear from Sonora, although anecdotal accounts exist from the mid-1800s to early 1900s. The present record also establishes that brown bears, considered extirpated from Mexico since the 1960s, were present in Sonora within the past 30 years.
The same ocelot that has been photographed on 3 previous occasions in the Huachuca Mountains has been seen again.
A hunter's trail camera snapped a photo of a jaguars tail on Sept. 23, 2012.
Jaguars are endangered in Mexico and the United States, necessitating careful monitor- ing of population status. We determined minimum numbers of jaguars and sympatric pumas in a small population in northern Sonora, Mexico, the nearest known breeding population to the United States, by photographic captures supplemented by idiosyncratic features of tracks from track surveys (1999-2005). We also developed a discriminant function to differentiate species (jaguar v. puma) and sexes within species, which also aided in individual identification.
