Colony counts and environmental covariates of the American white pelican colony on Gunnison Island, UT, USA

Annual colony counts of American white pelican (Pelecanus erythrorhynchos) at Gunnison Island, Utah, USA, and selected environmental covariates hypothesized to influence colony population dynamics at this location. Environmental covariates include mean springtime Great Salt Lake water levels, minimum springtime air temperature, mean annual Pacific Decadal Oscillation index values, and mean annual Southern Oscillation Index values across the study period.