27 January 2009

Gynandromorph cardinal... maybe

This is a gynandromorph cardinal, half male and half female... a genetic abnormality that happens when the sex chromosomes (Z and W in birds) do not separate normally during early embryonic development. Credit for this find goes to Bob Motz and the photos were taken by Jim Frink. (via Kottke)
Addendum: Discussion elsewhere indicates some of these bicolor cardinals may not be gynandromorphs, but rather partially leucistic birds (via i am the finch wench).


  1. I wonder why it's divide is left to right and not front to back?

  2. http://www.euronet.nl/users/hnl/halfside.htm
    That explains why.


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