Definition of "yellow-crowned" []

• Having the top of the head yellow, or yellow on the crown, as various birds; yellow-polled: as, the yellow-crowned night-heron. See night-heron.

The Century Dictionary (Public Domain)

• "This nocturnal species can be identified on the basis of its white underside in contrast, yellow-crowned night-herons have a grey underside whilst American bitterns have a cream-coloured underside with chestnut stripes."
• "The out channel is fringed with a swath of reed sweet-grass and sweet flag, and scattered, waist-high, lank, yellow-crowned spikes of great yellow-cress."
• "Captive birds can be inbred, or they can sometimes breed with yellow-crowned kakariki, which means they are not a pure native species."