cygnine

Being of the genus Cygnus (swans), within subfamily Anserinae of the family Anatidae, though sometimes considered a distinct subfamily, Cygninae.

The genus Choristopus, Eyton, apparently Anserine rather than Cygnine, is said to possess this character […]

Of, concerning, relating to, resembling, or characteristic of swans.

But, in the cutting of it, if thou dost shed / One drop of cygnine blood, thy clumsiness...

On the whole, then, the bones of the pectoral arch in Dendrocygna — if we may judge from the two North American species of the genus — are more anatine than they are either anserine or cygnine.

An alkaloid from plants of genus Gastrolobium, found in Australia, principally Western Australia, highly toxic to introduced animals.