Why do some birds, like raptors, move from one region to another at certain times of the year?   It is all about their interactions with their environment.  The primary factor is scarcity in a food source.  Another factor includes changes in the weather. This video and lesson integrate essential vocabulary for the NC science curriculum.  The explanation of this seasonal event includes an engaging way to introduce students to the abiotic and biotic factors that affect the raptor’s migration and provides a platform to investigate the types of relationships found in their ecosystem.