Tree-nesting Cliff Swallows
in the San Bernardino Mountains, California.
Relationship of Cliff Swallows
, ectoparasites, and an alphavirns in west-central Oklahoma.
Still bird watchers and conservationists say the numbers of cliff swallows
altogether are not on the decline.
colonies may contain up to 3000 nests (Brown & Brown 1986), whereas barn swallows nest in much smaller colonies (Snapp 1976).
(CS) nesting success (producing [greater than or equal to] 1 nestling) among high or low House Sparrow activity.
colonies of different sizes vary widely in the numbers of blood-sucking swallow bugs (Hemiptera: Cimicidae: Oeciacus vicarius) infesting the nests, and bugs represent a major source of nesting failure that tends to increase with colony size and swamps the effects of other independent variables (Brown and Brown 1996).
Breeding range expansion of the cliff swallow
in Northwest Louisiana.
She adds that such preferences could have huge implications for designing preserves for creatures that, unlike cliff swallows
, eschew bridges and other trappings of humanity.
The migrants are gone, like the swifts and the cliff swallows
,'' Jim said.
5) Cliff swallows
peer out at the world from their nests.
Charles Brown, a Yale University biologist, reports that cliff swallows
living in colonies of two to 3,000 nests watch each other for behavior indicating the availability of food.
At this desert viewpoint, crickets chirp, crows squawk and peregrine falcons swoop past, hunting cliff swallows
The battle pits two cliff swallows
(Petrochelido npyrrhonota) against each other, midnight blue on their backs and pumpkin orange on their throats.
Brood parasitism and egg transfer in Cave Swallows (Petrochelidon fulva) and Cliff Swallows
Bird watchers who frequent the Center have since spotted more than 100 different species, from cliff swallows
to bald eagles.