Double-brooding in the Boat-billed Heron

We studied the breeding phenology of a colony of Boat-billed Herons (Cochle arius cochlearius) on the Caribbean slope of Costa Rica during 1999. Breedi ng season lasted from early February to July and two periods of nesting wer e recorded, strongly suggesting the occurrence of double-brooding. Clutches from the first and the second period started during the dry season, but cl utches from the second period developed during the rainy period.