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Murine Mouse Opossum
Marmosa murina Murine Mouse Opossum image
Size: body=12 cm; tail=30 cm; weight=40 g
Description: Small sized: relatively short fur; back and head greyish or reddish brown; cheeks and belly salmon-coloured or pinkish (not white) and not contrasting strongly with colour of back and sides; prominent black eye-ring. Long naked, prehensile tail. Female does not have a pouch. Eyeshine bright red.
Activity: Nocturnal, arboreal and terrestrial.
Habits: Solitary, it mainly eats insects. Forages in low vines and on the forest floor for insects and the occasional fruit. It is most commonly found up to 3 metres above ground. When approached closely (and deliberately) it will freeze motionless in the beam of a light to the point that it can even be petted.
Habitat: One of the most common mouse-opossums in secondary forest and near clearings. Often found near the edges of streams, in dense vegetation and in vine tangles. Sometimes enters houses and buildings at the edge of forest.
Status: Locally common in Iwokrama.
Distribution in Iwokrama
Woolly Mouse Opossum
Micoureus demerarae Woolly Mouse Opossum image
Size: body= 18 cm; tail= 23 cm; weight= 100 g
Description: Largest mouse opossum: fur long and woolly; back and head greyish- brown; cheeks orangish and belly greyish-orange or yellow; prominent black eye ring. The long tail is furred for 25-50 mm from its base; naked portion of the tail dark brown with a mottled white tip. Female does not have a pouch. Eyeshine bright red.
Activity: Nocturnal, mainly arboreal in understory or sub canopy.
Habits: Usually solitary, eats insects, small vertebrates and fruit. Common in dense viney vegetation along the edges of streams. Usually build nests in vine tangles or crowns of palms.
Habitat: Primary and secondary forest, especially dense viney vegetation along the edges of streams. Like the Murine Opossum they will inhabit houses in forested areas.
Status: Common in Iwokrama.
Distribution in Iwokrama
Delicate Mouse Opossum
Marmosops parvidens Delicate Mouse Opossum image
Size: body= 10 cm; tail= 15 cm; weight= 20 g
Description: Tiny mouse opossum: fur relatively short; back and head velvety-brown; cheeks and belly greyish white; darkish eye ring usually present; feet white. Naked ears large and conspicuous. The arms and legs are noticeably long, thin and delicate. The long tail is naked and uniform brown. Female does not have a pouch.
Activity: Nocturnal, arboreal and terrestrial.
Habits: Solitary, eats insects and fruit. Found near the ground in the understory of open forest, sometimes on small fallen branches or saplings. Typically slow moving and deliberate.
Habitat: Primary terra firme forest.
Status: Uncommon.
Distribution in Iwokrama
Short-tailed Opossum
Monodelphis brevicaudata Short-tailed Opossum image
Size: body= 16 cm; tail= 9 cm; weight= 100 g
Description: Only small terrestrial opossum in Guyana with a short tail: back and top of head with a broad band of silvery dark grey or black, contrasting sharply with deep reddish on sides of body and throat; feet black. Short, blackish tail furred for one-third to one-half its length. Relatively short, broad muzzle. Female does not have a pouch.
Activity: Diurnal, mainly terrestrial.
Habits: Solitary, insectivorous. Usually travels on the ground, but it also runs on top of fallen logs and occasionally climbs in small trees.
Habitat: Mature and secondary forest, and in gardens. Usually found in upland forest away from streams.
Status: Apparently uncommon in Iwokrama.
Distribution in Iwokrama

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