these two swans lost their head...LOL------------- Four black Australian swans were introduced into our area about 3 years ago; They had 5 babies, all killed by cats during the first month; The year after, same problem occured; during the first year, the black swans were chased by the resident much larger white (mute) swans; One year later, 3 adults disappeared and only one male survived; Finally, at the begining of this year, the white swans accepted the presence of the black survivor; and the surprise emerged this summer: one of the resident female had 3 pure white and 2 grey ones, obviously the offsprings of the black male; I didn't find on Google the occurrence anywhere of grey swans...