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Competition
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When spring migration peaks there can literally be hundreds of thousands of
passerines on the move from their wintering grounds in Latin America to their
breeding grounds up north. With so many beaks to feed competition for food can
play an important role in where individuals choose to stop during migration. The
presence of other migrants and/or resident species may simultaneously indicate a
quality place to stop to refuel and a place to be avoided because of increased
competition. Despite the importance of understanding the conditions that favor
migrant stopover, little is know about how competition shapes where individual
birds choose to stop and feed. By assessing densities of migrant and resident
species and following individuals as they feed we hope to better understand how
stopover decisions are shaped by competition. |