To evaluate the potential impact of logging on nocturnal primates, den
sities of Galago demidovii, G. inustus, and Perodictus potto were dete
rmined in two areas of the Kibale Forest Reserve, Uganda. One of these
areas had been logged at a moderate level in the late 1960's, while t
he second area was relatively undisturbed. The density of the nocturna
l primates was lower in the logged area than in the neighboring unlogg
ed area. For the most frequently sighted nocturnal primate, G. demidov
ii, sightings were spatially clustered both within a year and between
years, suggesting that clumped resources and/or social factors were in
fluencing space use.