The potential to lay replacement clutches by tree swallows

Article Abstract:

Forty-one percent of female tree swallows whose first clutches have been removed from their nest boxes subsequently laid replacement clutches. Their first clutches were bigger than those of females that did not re-lay, indicating that female quality influences if a replacement will be produced. The replacement clutch of re-laying birds was much smaller than their first clutch, suggesting a depletion of energy reserves with each nesting or an attempt to ensure survival for the next breeding season.

Sexual behavior in animals, Animal sexual behavior

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Old nest material in nestboxes of tree swallows: effects on reproductive success

Article Abstract:

The impact of old nest material on the reproductive capability of tree swallows was evaluated using data based on 72 captured nestling females in 1991 and 108 birds in 1992. More fleas per nestling were observed in 1992 nests than in 1991, while blowfly numbers did not vary substantially for either year. Decreasing numbers were observed for young fledged per pair, fledged young/hatchling percentages and fledged young/eggs laid in 1992 than in 1991.

Birdhouses

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Responses of birds to broken eggs in their nests

Article Abstract:

Research is presented concerning the response to and response times of Barn Swallows and Tree Swallows to actual and simulated egg damage in their nests. The difference in response times is discussed.

Behavior

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