A Breeding Bird Survey on Uncultivated Grassland at Regina

Effects of wind-energy facilities on breeding grassland bird distributions.

The contribution of renewable energy to meet worldwide demand continues to grow. Wind energy is one of the fastest growing renewable sectors, but new wind facilities are often placed in prime wildlife habitat. Long-term studies that incorporate a rigorous statistical design to evaluate the effects of wind facilities on wildlife are rare. We conducted a before-after-control-impact (BACI) assessm...

On Grassland Bird Conservation in the Northeast

Populations of many grassland birds in North America have declined significantly during the last 30 years (Knopf 1994, Peterjohn and Sauer 1999). Although population trends of many groups of breeding birds vary across geographic regions (James et al. 1992, Herkert 1995, Sauer et al. 1997), the declining trend for grassland birds is consistent across much of North America, including the Northeas...

Preliminary analyses of Breeding Bird Survey (BBS) mammal data

Nest Defense- Grassland Bird Responses To Snakes

Predation is the primary source of nest mortality for most passerines; thus, behaviors to reduce the impacts of predation are frequently quantified to study learning, adaptation, and coevolution among predator and prey species. Video surveillance of nests has made it possible to examine real-time parental nest defense. During 1999-2009, we used video camera systems to monitor 518 nests of grass...

Antagonistic effect of helpers on breeding male and female survival in a cooperatively breeding bird

1. Cooperatively breeding species are typically long lived and hence, according to theory, are expected to maximize their lifetime reproductive success through maximizing survival. Under these circumstances, the presence of helpers could be used to lighten the effort of current reproduction for parents to achieve higher survival. 2. In addition, individuals of different sexes and ages may follo...