Territorial aggression influences fitness and, in monogamous pairs, the behavior of both
individuals could impact reproductive success. Moreover, territorial aggression is particularly …

Abstract Abstract. Eastern bluebirds, Sialia sialis and tree swallows, Tachycineta bicolor,
compete aggressively for nest cavities, and competition for cavities may force a trade-off …

Intraspecific competition for access to breeding resources may limit male mating success
typically monogamous birds. We examined the potential for intraspecific competition to limit …

Identifying correlations among behaviors is important for understanding how selection
shapes the phenotype. Correlated behaviors can indicate constraints on the evolution of …

Highlights•Behavioural similarity within mated pairs may impact reproductive success.•We
quantified nest defence behaviour of eastern bluebirds and tested three hypotheses.•The …

Because 95.5% of breeding eastern bluebirds on study sites in South Carolina were
apparently monogamous, I examined hypotheses for the evolution of monogamy. In an effort …

Three previous studies have disagreed on whether breeding synchrony increases nest
success through reduced nest predation in Red‐winged Blackbirds (Agelaius phoeniceus) …

Two hypothesized benefits of delayed dispersal are access to resources and prolonged
brood care (or parental nepotism). Resource abundance (mistletoe wealth) is a key factor …

Naturally occurring aggression between female eastern bluebirds (Sialia sialis) is dramatic,
resulting in severe injuries and even death. Furthermore, aggression among bluebirds is …

Using data from a 6-year paternity study of red-winged blackbirds, I tested the hypotheses
that increased nesting synchrony should either promote extra-pair mating by increasing the …