This marsupial is strongly associated with moist habitats and tropical evergreen forest. It is found in rainforest, often in the dense, tangled forest understory or in weedy areas. It is also found in vegetation along rivers and in secondary forests. This species is especially common in swampy, disturbed areas such as those dominated by Heliconia species in areas of modified forest. It tolerates secondary gowth and disturbed areas, such as plantations, fields, orchards, and human settlements.

This mouse opossum is arboreal, nocturnal, and insectivorous, but it is versatile in its habitat exploitation and is frequently trapped on the ground, sometimes near human dwellings. Its diet consists of about two-thirds insects and other small animals,and one-third fruit. The female is tolerant of the male only during estrus; copulation may last several hours, and gestation takes thirteen days. The litter size averages 5.8. The female constructs a leaf nest by transporting nesting material with her prehensile tail. Young are weaned at about 12 g body weight (Eisenberg and Redford, 1999; Emmons and Feer, 1997).

ABSMS116-06|ROM 117278|Marmosa murina| ---------------------------------------ACCTTATACTTACTATTTGGTGCTTGAGCAGGAATAGTGGGCACTGCTTTA---AGCTTATTAATTCGTGCTGAACTAGGTCAACCTGGAACACTAATCGGAGAC---GACCAAATTTATAATGTTATTGTTACTGCTCACGCTTTTGTCATAATTTTCTTTATAGTAATACCCATCATAATCGGAGGCTTTGGCAACTGACTTGTACCATTAATA---ATTGGCGCCCCTGACATAGCCTTTCCACGAATAAATAATATAAGTTTCTGACTTCTTCCTCCATCATTCTTATTACTTCTAGCATCCTCCACAGTTGAAGCAGGGGCTGGAACCGGATGAACAGTTTATCCTCCACTAGCTGGTAACCTAGCTCATGCAGGAGCCTCAGTTGACTTA---GCAATTTTTTCTCTTCACCTAGCCGGCATTTCTTCTATTCTAGGGGCTATTAATTTTATTACTACTATTATTAATATAAAACCACCAGCAATATCTCAATATCAAACTCCCTTATTTGTTTGATCTGTAATAATTACAGCAGTTCTACTTTTACTATCTTTACCAGTTCTTGCCGCA---GGGATTACTATACTCTTAACAGACCGAAATTTAAACACTACATTTTTTGATCCTGCTGGTGGAGGTGACCCAATCTTATATCAACACTTA------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 
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Red List Category

Red List Criteria

Year Assessed

Assessor/s

Reviewer/s

Justification

History

• 1996
  Lower Risk/least concern
  (Baillie and Groombridge 1996)
• 1996
  Lower Risk/least concern
  (Baillie and Groombridge 1996)

This species is widespread and often common (Emmons and Feer, 1997).

Stable

No major threats are known to this species.

This species occurs in a number of protected areas throughout its range.