World Bird List

Species factsheet
Yellow-crowned Night Heron (Nyctanassa violacea)

Order: Nyctanassa violacea
Family: Herons, Bitterns (Ardeidae)

Danske navn: Gulkronet Nathejre

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
violacea c and e USA to e Mexico and e Costa Rica
bancrofti w Mexico to w Nicaragua, Socorro I., West Indies
caliginis Panama and w Colombia to Peru
cayennensis Panama and ne Colombia to ne Brazil
pauper Galápagos Is.