Hylodes asper
Brazilian Torrent Frog
family: Hylodidae

© 2004 Ariovaldo Giaretta (1 of 7)

  hear call (716.3K MP3 file)

[call details here]

View distribution map using BerkeleyMapper.

Conservation Status (definitions)
IUCN (Red List) Status Least Concern (LC)
See IUCN account.
Other International Status None
National Status None
Regional Status None


Distribution and Habitat

Country distribution from AmphibiaWeb's database: Brazil

View distribution map using BerkeleyMapper.
This species occurs in southeastern Brazil, in the states of Rio de Janeiro, São Paulo, and Paraná. It is found in both primary and secondary forest, along forest streams and rivers, on steep hillsides up to 1,200 m above sea level (IUCN 2006).

Life History, Abundance, Activity, and Special Behaviors
Hylodes asper lives along forest streams and rivers. For territorial displays in this high-noise environment, the frog uses a kind of semaphoring (slowly raising and waving a rear leg, one at a time), in addition to calling. This behavior is known as foot-flagging, since the slow waving of the frog's large rear foot resembles a flag waving.


The video below shows foot-flagging display in Hylodes asper. Published with permission from the Institute of Zoology, Vienna, Austria (W. Hoedl).


Haddad, C. F. B., and Giaretta, A. A. (1999). ''Visual and acoustic communication in the Brazilian torrent frog, Hylodes asper (Anura: Leptodactylidae).'' Herpetologica, 55, 324-333.

Written by Kellie Whittaker (biologist AT, UC Berkeley
First submitted 2008-04-17
Edited by Kellie Whittaker (2014-05-01)

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Citation: AmphibiaWeb: Information on amphibian biology and conservation. [web application]. 2015. Berkeley, California: AmphibiaWeb. Available: (Accessed: Nov 29, 2015).

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