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

## TL;DR

This study shows that Ucayali bald uakaris are more often seen during dry seasons, suggesting they migrate between different habitats.

## Contribution

The study provides new insights into the seasonal movement and habitat use of Cacajao ucayalii.

## Key findings

- Sightings of Cacajao ucayalii are more frequent during the dry season.
- The species appears to migrate between terra firme and floodplain forests seasonally.
- Conservation areas should be large to accommodate their seasonal movements.

## Abstract

This paper reports long-term data on the seasonality of sightings of Ucayali bald uakaris, Cacajao ucayalii at the Estación Biológica Quebrada Blanco (EBQB). Sightings were most common during the drier parts of the year and rarer during the rainy season. This suggests that the C. ucayalii groups travel long distances and seasonally move (migrate) between different parts of presumably large home ranges and between different habitats (terra firme forest, Amazon floodplain forest). Areas to protect this Neotropical primate must be large enough to allow for sufficient seasonal access to these vegetation types.