Play Ranitomeya sirensis Call
Originally described from the Cordillera El Sira in central Peru. Aichinger wrote that the type series was taken at elevations between 750 and 1560 m. The Cordillera El Sira is a large and extremely isolated mountain range, rising to elevations of over 2400 m. Most populations of this species are known from lowland habitats, although it has been recorded as high as ~1500 m elevation near Tingo Maria. Following the redefinition of this species (see Brown & Twomey et al. 2011), it is distributed from southern to central Peru throughout Madre de Dios and the Ucayali drainages. Also occurs in adjacent Brazil and Bolivia.
For decades this was one of the most poorly known species of poison frogs. Aichinger suggested that this species was highly arboreal because of its remarkable agility and its long hands with well-developed finger discs. He also speculated that this species employed similar reproductive strategies as other species of Ranitomeya, as females were found to lay clutches of one or two eggs. Our observations are consistent with this idea, as we witnessed a putative courting pair in a phytotelm. This species is most common in areas where phytotelmata are abundant, especially bamboo and Xanthosoma.
Following the results from Brown & Twomey et al. (2011), the definition of R. sirensis has been greatly expanded and now this species appears to have an extensive distribution from central Peru to Bolivia. It occurs widely throughout the Ucayali, Huallaga, and Madre de Dios drainages of Peru. Following this redefinition of the species, we recommend it being listed as Least Concern (LC)
Brown & Twomey et al. (2011) provided bioacoustic, genetic, and behavioral evidence that R. lamasi, R. sirensis, and R. biolat were all members of a single, widespread and highly polymorphic species. Due to rules of precedence, R. sirensis is the valid name, and lamasi and biolat are now considered junior synonyms of sirensis.