Native, cavity-nesting birds such as Eastern Bluebirds, Tree swallows and House wrens often compete with aggressive, non-native birds like European starlings and House sparrows. Identifying which birds are using the birdhouses at Lubberland Creek will help us determine whether or not these non-native birds are posing a threat on the preserve. Volunteers who attend this event will learn more about cavity-nesting birds and nest identification. We will also clean old nests out of boxes, repair houses using hand tools, and prepare them for birds returning in the spring.