• 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


Loxia curvirostra photo by Elaine R. Wilson via Wikimedia Commons


Loxia curvirostra photo by Elaine R. Wilson via Wikimedia Commons  


Loxia curvirostra photo by Dave Menke via Wikimedia Commons


The common crossbill, a specialist seed-eater of conifers, is one of the best examples of raciality in a non-human animal. This species has about ten races in North America alone, each of which forages on a different genus or species of conifer and has its own distinct vocalisations accompanied by slightly different beak sizes. What makes these categories races rather than species or subspecies is that they overlap in their ranges and are genetically completely compatible for interbreeding, yet remain distinct via cultural programming.


Robin and the Honey Badger, 22 March 2016







i.e. more intensely pigmented than the normal colour-morp
Last modified on 01 April 2016

You have no rights to post comments