Effects of suburban development (sprawl), concurrent climate and increasing avian food on a population of Eastern Screech-Owls (Megascops asio) were studied for three decades using nest boxes and natural tree-cavity nests in residential yards and adjoining natural forest in central Texas. The suburban climate was warmer by 5.7 °C associated with suburbia's heat-island effect by the last decade of study. Nesting started earlier by an average of 4.5 days annually and fledgling productivity increased by 31.4%. Avian prey increased and contributed to 93% successful annual nests in a more stable population. Bird feeders and bird baths were likely enhancing factors at residences, where owls obtained prey and used bird-bath water for drinking and bathing.