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Baboons occur in a large range of different habitats. However, data on the ecology of Guinea baboons were scarce. We provide information on the ranging behaviour, habitat use, and diet of a population of Guinea baboons in the Niokolo-Koba National Park, Senegal. Home ranges were about 25 km², and they moved up to 13 km per day. They seem to prefer the more forested parts of their home range near the river. Fruit dominates their diet, and the nuts of the palmyra palm are a year-round food source.

We report the first masturbatory behaviour in a male Phayre's langur, in a semi-evergreen forest in Bangladesh. We discuss possible reasons for masturbation and suggest an adequate characterization of the socio-sexual behaviour and reproductive strategies of this globally endangered primate to demonstrate the causes, cost and consequences of masturbation. We also urge further scientific exploration into masturbation among primates due to its evolutionary and conservation significance.

To our knowledge, this study is the first report of spontaneous Hashimoto-like chronic lymphocytic thyroiditis in a rhesus macaque (Macaca mulatta). Despite the microscopic similarities to human cases, autoantibodies (thyroglobulin antibodies, thyriod peroxidase antibodies, and thyroid-stimulating hormone receptor antibodies) were not identified in this rhesus macaque using a human electrochemiluminescence immunoassay system.

This paper discusses the status of a tamarin specimen housed at the American Museum of Natural History that is wrongly labelled as Saguinus fuscicollis tripartitus and might represent a species or subspecies unknown so far or a hybrid.