Photographic Maps

Vocal Profiles

Primate Records

Distribution Maps












































Yvonne A. de Jong Thomas M. Butynski

Eastern Africa Primate Diversity and Conservation Program P.O. Box 149, Nanyuki 10400, Kenya

The Eastern Africa Primate Diversity and Conservation Program is a long term research program based in Kenya. The program was founded in 2003 and focuses mainly on primate biogeography, diversity, taxonomy and conservation in Kenya and Tanzania. However, the program also looks into the biogeography of other African mammals. Click on Projects for more information.

National Geographic Explorers Journal



Vocal Profiles for the Galagos: A Tool for Identification

The galagos (Family Galagidae) of Africa are nocturnal, small, and often difficult to observe, and most species are phenotypically cryptic. As such, galagos are frequently difficult to identify with confidence, particularly in the field. Being nocturnal, conspecifics mainly identify each other using auditory and olfactory cues...not visual signals. All galagos produce species-specific ‘loud calls’ (or ‘advertisement calls’). Loud calls have several functions, one of which is long-distance species identification. Knowing this, field scientists are now able to identify all currently recognized species of galagos by their loud calls.

he Nocturnal Primate Research Group at Oxford Brookes University maintains a collection of the calls of African wildlife which includes more than 300 hours of recordings. These recordings have been obtained by the Group’s 24 members from many field sites over the past 40 years. From this extensive collection, 27 vocal profiles for 24 taxa of galagos have been compiled. These recordings are now freely available on this website ('Vocal Profiles').

Each species presented on the website is illustrated by Stephen Nash, and there is an ‘audiomap’ that depicts the site at which each recording was made.

Additional recordings of galagos and other species will be added to this site as they become available. If you would like to hear further examples of each call type, or if you have good quality recordings of galago vocalizations that you would like to deposit with the Nocturnal Primate Research Group, please contact Simon Bearder at:

This product is the result of a joint initiative of the Nocturnal Primate Research Group and the Eastern Africa Primate Diversity and Conservation Program.

Young Kenya coast galago (Galagoides cocos) at Mpeketoni, north coast of Kenya. Photograph by Yvonne de Jong & Tom Butynski.



Have you seen patas monkeys in Laikipia (or elsewhere in Africa)?

To manage Laikipia’s patas population, it is important to monitor changes in its distribution and size. The Eastern Africa Primate Diversity and Conservation Program is conducting a Laikipia patas survey.

Have you encountered patas in Laikipia or anywhere else in Africa? Please complete our questionnaire, it will only take a few minutes!!

Thank  you, your help is much appreciated!

Adult male eastern patas monkey Erythrocebus patas pyrrhonotus.
Ol Pejeta Conservancy, Kenya. Photograph by Robert Copeland

Have you seen primates in Eastern Africa?

The Eastern Africa Primate Diversity and Conservation Program is in the process of documenting the distribution of the regions primates and would very much like to receive details and photos of your encounters with primates in Eastern Africa. Please help us by providing your
records here!!


'Mammals of Africa (MoA) is a series of six volumes which describes, in detail, every currently recognized species of African land mammal. This is the first time that such extensive coverage has ever been attempted, and the volumes incorporate the very latest information and detailed discussion of the morphology, distribution, biology and evolution (including reference to fossil and molecular data) of Africa's mammals.......'

Click here for more information!

In collaboration with

Institute of Primate Research