Assertion: trumpeter swan | /r/CapableOf | show pale spot
Facets:
Source sentences:
text: Most Tundra Swans have at least a small yellow spot in front of eye, about 10% have a large yellow spot and also in about 10% this is all black, like Trumpeter, and therefore not useful for ID (it has been reported that Trumpeter can also show a pale spot, so one should not assume that this makes the bird a Tundra, but such a spot, and particularly the presence of symmetrical yellow spots on both sides of the bill, is probably so rare in Trumpeter as to be safely ignored.)