• 688px-Petrogale xanthopus -Monarto Zoo South Australia-8a
  • x.YFRWallabyLeap-1
  • video clips image
  • 13794880435 63413a3485 c
  • article-2546578-1AF7A0C100000578-491 634x422
  • SpottedSalamander
  • 13795093335 d4be758f3e o
  • gammy eye kitty
  • King cheetah
  • fig8
  • tiger head
  •  figure 5 an everlasting-daisy left image
  • bio bullet image
  • bio musings image
  • Desert oak
  • bio-expositions image
  • bio bullet image
  • bio musings image
  • bio-expositions image
Speciation of wildebeests across the dark-pale divide



Connochaetes mearnsi photo ©  Stefan Swanepoel


Connochaetes albojubatus adult male photo ©  Paul Mannix


Two species of white-bearded wildebeests in East Africa have diverged categorically in how they achieve whole-body conspicuousness at a distance. Although both rely on gloss-versus-gloom effects as well as pigmentation, the western species looks dark overall whereas the eastern species looks pale overall. This fits an overall pattern seen in migratory hoofed mammals adapted to either mesic or semi-arid habitats.


Robin and the Honey Badger, 22 March 2016



Pale white-bearded wildebeest (Connochaetes albojubatus)

Dark white-bearded wildebeest (Connochaetes mearnsi)








i.e. more intensely pigmented than the normal colour-morp
Last modified on 19 August 2016

You have no rights to post comments