by Stephen C. Smith -- Malabo, Equatorial Guinea -- March 17, 2012
A group hanging in a tall tree.
Seen in Entebbe Botanical Gardens Uganda
we only heard them in the late evening and he came back in the morning around 3 am for more love songs, only saw the eye shine
typical "mating call" several times during the early night of 9-10 November 2011
Hypsignathus feeding on large figs (Ficus) at night, one of two main foods during breeding season. Figs are spotty and ephemeral foods for these bats. Their regular staple that is traplines are several species of Anthocleista. Photo taken at fig across river from lek in August 1972.
Male hanging from his display perch on lek, flapping wings, and calling during peak mating season July 1971. Male is performing "staccato buzz", a rapid modulation of honking call performed to females when they hover near the male. Female can barely be seen on right of photo hovering to this male. Females visit multiple males (indicated by sequence of staccato buzzes along lek) and then select one for mating. Female ends copulation with loud squeals so matings are easily counted.
Adult female carrying newborn offspring, netted with canopy net while visiting lek at peak of season in July 1971. Likely evidence for post-partum oestrus in this species.
Captured during lek season using canopy net on lek in July 1971. Fully adult male. Measured, marked, and released.
The Hammer-headed Bat (Hypsignathus monstrosus), also known as the Big-lipped Bat, is a megabat widely distributed in equatorial Africa. This large bat is found in riverine forests, mangroves, swamps, and palm forests at elevations less than 1800 meters.