1980. Paperback in as new condition. Vol. IX. Second Annual Meeting October 20-23, 1978. Papers presented were: The Habitats, Distribution, and Numbers of Northern Seabirds. Bourne, The Pelagic Ecology of Seabirds. Brown, Population and Colony-Site Trends of Long Island Waterbirds for Five Years in the Mid 1970s. Buckley, Coastal Surveys-Northeast and Northwest. Drury, Censusing Waterbird Colonies: Some Sampling Experiments. Erwin, The Effects of Timing of Breeding, Dispersion of Nests, and Habitat Selection on Nesting Success of Colonial Waterbirds. McCrimmon, Effects of Toxic Pollutants on Productivity in Colonial Waterbirds. Nisbet, The Influence of Annual Variation in Rainfall and Water Levels on Nesting by Florida Populations of Wading Birds. Ogden et al, Census Methods for Gulf Coast Waterbirds. Portnory, Why Are There Different Kinds of Heron?. Recher.