Melanism which extends beyond the skin into an animal's connective tissue is a rare trait, and in chickens it is caused by fibromelanosis, which is a rare mutation believed to have begun in Asia.
A man has been arrested after rare birds, believed to be owls, were discovered in his freezer.
The commission said these occasions were actually rare: it believed the real task was to strengthen English democracy and Westminster's accountability to England's voters in the post-devolution era.
Until last year, Zika was so rare, and believed to be so mild, that nobody bothered to look for candidate drugs.
There was an ancient brush painting featuring rare birds, believed to be the only existing hand-drawn painting by Emperor Huizong of the Song Dynasty.
A rare deer, believed to be locally extinct in Afghanistan, was later found to have survived decades of war and turmoil, for example.
Given that full societal participation in politics is rare, Schattschneider believed that groups that benefited from the status quo, primarily businesses and wealthy individuals, controlled the political environment.
"Good is rare enough, believe me".
He had the virtue, one that is becoming increasingly rare, of believing that everything was important, or, rather, that everything that came from him was unique.
