Burt’s deer mouse is known only from Montserrat Island in Mexico. A survey in the 1990s captured very few animals, so information about the species remains limited.
The back and sides are washed with ochraceous buff, contrasting with a grayish head. The underparts are pale, and the tail is dusky above and whitish below.
A 1994–1997 trapping survey caught four animals in 2,000 trap-nights. One captured female was lactating in October 1994.
An extinction-risk assessment has not been added yet.