Articles | Volume 12, issue 1
https://doi.org/10.5194/pb-12-9-2025
https://doi.org/10.5194/pb-12-9-2025
Research article
 | 
15 Sep 2025
Research article |  | 15 Sep 2025

Seasonality of sightings of Cacajao ucayalii at the Estación Biológica Quebrada Blanco and implications concerning ranging patterns and habitat use

Eckhard W. Heymann, Camilo Flores Amasifuén, and Ney Shahuano Tello

Cited articles

Aquino, R.: Preliminary study on the population densities of Cacajao calvus ucayalii, Primate Conservation, 9, 24–26, 1988. 
Aquino, R.: Some observations on the ecology of Cacajao calvus ucayalii in the Peruvian Amazon, Primate Conservation, 18, 21–24, 1998. 
Barnett, A. A., Bowler, M., Bezerra, B. M., and Defler, T. R.: Ecology and behavior of uacaris (genus Cacajao), in: Evolutionary biology and conservation of titis, sakis and uacaris, edited by: Veiga, L. M., Barnett, A. A., Ferrari, S. F., and Norconk, M. A., Cambridge University Press, Cambridge, 151–172, ISBN 978-0-521-88158-6, 2013. 
Bartecki, U. and Heymann, E. W.: Sightings of red uakaris, Cacajao calvus rubicundus, at the Río Blanco, Peruvian Amazonia, Primate Conservation, 8, 34–36, 1987. 
Bowler, M.: The ecology and conservation of the red uakari monkey on the Yavarí river, Peru, PhD thesis, University of Kent, Canterbury, https://doi.org/10.22024/UniKent/01.02.86391, 2007. 
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Short summary
At the Estación Biológica Quebrada Blanco (EBQB), in north-eastern Peru, Peruvian red uakaris have been repeatedly sighted during long-term field research. The marked seasonality of sightings indicates that the EBQB area represents only a fraction of the uakari's home range and suggests that they undertake large-scale seasonal movements between different parts of the home range and between different habitats. Conservation strategies must take probably large space requirements into consideration.
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