A, J Blue mussels Mytilus edulis A, J Variable Bittium Bittium varium A, J, E Slipper limpet Crepidula convexa A, J, E Birds Brant goose Branta bernicla M Canada goose Branta canadensis M Greater scaup Aythya marila M Redhead duck Aythya americana M Great blue heron Ardea herodias A Great egret Casmerodius albus A Reptiles Kemp's ridley sea turtle Lepidochelys kempu A, J Loggerhead sea turtle Caretta caretta A, J Green sea turtle Chelonia mydas A, J
Num- Percent- Common name Scientific name ber age Great Egret Casmerodius albus 60 23.9 Reddish Egret(*) Egretta rufescens 1 0.4 Green-backed Heron Butorides striatus 1 0.4 Laughing Gull Larus atricilla 8 3.2 Boat-tailed Grackle Quiscalus major 163 64.9 Clapper Rail Rallus longirostris 2 0.8 Spotted Sandpiper Actitis macularia 4 1.6 Unidentified 12 4.8 * Reddish egrets are rare in North Carolina, but this identification was confirmed by John Fussel.
Water depth selection during foraging and efficiency in prey capture by the egrets Casmerodius albus and Egretta thula (Aves, Ardeidae) in an urban lagoon in Rio de Janeiro State, Brazil.
The other five species (in larval form) all mature in the piscivorous birds Casmerodius albus and Phalacrocorax olivaceus, found at Tres Palos Lagoon (data not included), and were thus classified as allogenic: C.