Meeting Abstract

P3-97   -   Perch locations impact on aggression display of the Eastern bluebird (Sialia sialis) Passeretti, MS*; Foltz, S; Radford University; Radford University mpasseretti@radford.edu

Preliminary investigations into eastern bluebird (Sialia sialis) nest defense behaviors have shown that as nests mature from incubation to fledgling, parents behave more aggressively towards perceived predation threats. One such aggressive behavior is diving toward the perceived predator; therefore nestling location in relation to structures that provide perches to dive from may impact displays of this behavior and so affect the apparent aggressiveness of a nesting pair. Here we investigated possible correlations between the distance between local perches and nesting locations and aggression displayed by nesting pairs of adult bluebirds . Measurements of nesting activity and parental responses to proxy predators (the researchers conducting nest checks) were documented throughout the breeding period of the eastern bluebird in 2021 across 56 possible nesting locations that were set up for the purpose of this study. Measurements between nesting sites and nearby perch structures was also taken. At this time data is still being compiled and analyzed. We predict that the data will support the idea that eastern bluebirds nesting near available perches will display more aggressive behavior, and in particular more diving. This in turn may enable better nest defense and improved nestling survival. The research will result in a better understanding of nest defense strategies of the eastern bluebirds and may be important for future conservation efforts.