Assertion: magpie's feather | /r/HasProperty | black
Facets:
Source sentences:
text: They have black feathers on their head, upper breast, back, and tail, and large white patches on their wings and lower chest.
text: The feathers are all black.
text: A study of melanosomes (the pigmented, melanin-producing granules present in specialized skin cells called melanocytes) in the animal’s feathers revealed that the feathers were black and that the arrangement of the granules within the feather’s microstructure probably provided increased structural support to the wings, similar to the way it does in modern birds.