White-headed sentence example
Small numbers of White-headed ducks were found breeding at 11 wetlands.
The two species hybridize and hybrids are fertile, causing genetic introgression of Ruddy Duck genes in the wild population of White-headed Ducks.
Contents Featured Bird - in the first of a regular series we take a look at the White-headed Duck.
Without the presence of Ruddy ducks, the White-headed duck population in Spain is thought to be self-sustaining.
Then a cry from Helen and we all scrambled to see a fine White-headed Vulture standing aloof from the rest.Advertisement