Female Mandrill (Mandrillus sphinx) in esterus showing sexual skin tumescence. Walking through gallery forest during dry season. Lope National Park, Gabon. Photographed in the wild. July 2008.
Female
Mandrill
(Mandrillus
sphinx)
in
esterus
showing
sexual
skin
tumescence.
Walking
through
gallery
forest
during
dry
season.
Lope
National
Park
Gabon.
Photographed
in
the
wild.
July
2008.