Custer, T. W., and Frederick, P. C., 1990, Egg size and laying order of snowy egrets, great egrets, and black-crowned night-herons: Condor, v. 92, no. 3, p. 772-775. Abstract: The authors' objective was to describe egg size in relation to laying order for Great Egrets (Casmerodius albus ), Snowy Egrets (Egretta thula ), and Black-crowned Night-Herons (Nycticorax nycticorax ) in a southern Texas colony and Great Egrets in a southern Florida colony. Based on egg-size patterns in other colonial waterbirds and the occurrence of brood reduction in egrets and herons, they predicted that the final egg laid in a clutch would be smaller than those laid earlier. Keywords: egg-laying, bird-eggs, aquatic-birds, Egretta-thula, Egretta-alba, Nycticorax-nycticorax, Ardeidae, USA, eggs-; size-; laying-order