Thomas Marent / Lesser Bush Baby (Galago senegalensis) at night, Mount Kenya National Park, Kenya

Charlie Summers / Senegal bushbaby (Galago senegalensis) on tree, Vumi Hills Lodge, Mkumi National Park, Tanzania.

Charlie Summers / Senegal bushbaby (Galago senegalensis) on tree, Vumi Hills Lodge, Mkumi National Park, Tanzania.

Barrie Britton / Rondo dwarf galago (Galagoides rondoensis) from Rondo in south-east Tanzania

Chris Shields / Rondo dwarf galago (Galagoides rondoensis) illustration. Critically endangered species.

Wim van den Heever / South African galago / Lesser bushbaby (Galago moholi) at night, with spot light, Greater Kruger National Park, South Africa.

Wim van den Heever / South African galago / Lesser bushbaby (Galago moholi) at night, with spot light, Greater Kruger National Park, South Africa.

Wim van den Heever / South African galago / Lesser bushbaby (Galago moholi) about to jump at night, with spot light, Greater Kruger National Park, South Africa.

Ann & Steve Toon / Thicktailed greater bushbaby (Otolemur crassicaudatus), Mkhuze Game Reserve, KwaZulu-Natal, South Africa, May

Thomas Marent / Lesser Bush Baby (Galago senegalensis) at night, Mount Kenya National Park, Kenya

Ashish & Shanthi Chandola / Thick-tailed galago (Otolemur crassicaudatus) at night, Kruger National Park, South Africa, July.

Thomas Marent / Small-eared Galago (Otolemur garnettii), Zanzibar, Tanzania