Water depth selection during foraging and efficiency in prey captureby the egrets Casmerodius albus and Egretta thula (Aves, Ardeidae)in an urban lagoon in Rio de Janeiro State, Brazil

This study aimed to evaluate the water depth selection during foraging, the efficiency in prey capture, and the food items captured by Casmerodius albus (Linnaeus, 1758) and Egretta thula (Molina, 1782). The work was conducted at an urban lagoon, Lagoa Rodrigo de Freitas, Rio de Janeiro

Aline B. Moreno et al, Iheringia, Ser. Zool., Porto Alegre, 95(1):107-109, 2004