Scientists have long observed that roadways are attractive
foraging grounds for American kestrels and other birds of prey. That’s because
shorter grass makes mice and other snack-sized rodents more visible, and
signposts, fences and telephone poles provide excellent perches.
However, a new study from Boise State scientists shows that
even species considered “tolerant” of human activity may be adversely impacted
by human disturbance. Kestrels nesting in close proximity to roads and
developed areas had elevated stress hormones and high rates of nest
abandonment. The apparently favorable location, then, becomes an ecological
trap.