IUCN threat status:

Least Concern (LC)

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The rusty tree frog, Hypsiboas boans, is a large, sometimes orange-colored Neotropical hylid treefrog.  Widely distributed in tropical rainforests of the Amazon basin, the upper Orinoco river, the delta of the Orinoco river, Trinidad island (not present on Tobago) Trinidad and Tobago, the Guianas, Peru, lowland tropical Bolivia, the Amazonian basin of Brazil, and Venezuela this treefrog also has a small separate distribution in Pacific lowlands of Colombia, Northwestern Ecuador, and the central and eastern lowlands of Panama (La Marca et al. 2010; Huey no date).  There is significant morphological and behavioral variation of both adult and larval H. boans in Gran Sabana, Venezuela, and Duellman (1997; cited in La Marca et al. 2010) suggests they may be a separate species.

Found between 0-1000 m (3280 ft) in altitude, H. boans is a nocturnal species that perches in trees, bushes and sometimes exposed rocks, at a height of 5m (15 ft).  Adults build nest basins in mud and sand on the edge of slow streams or ponds in which to lay between 1300-3000 eggs in a gelatinous floating film.  When they hatch, the oval-shaped, light brown, green flecked-tadpoles wash into the river.  Fish find the larvae unpalatable.  During the dry season, rusty tree frogs are active at night on sandy or muddy edges of slow-moving streams.  Populations are large and wide-spread enough that IUCN classifies H. boans as of least concern.  However, it is not known if the species can adapt to habitat modification (La Marca et al. 2010; Huey, No Date)


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© Dana Campbell

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