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tree swallows
North Atlantic Oscillation Index
1
Southern Oscillation Index
1
avian embryos
1
behavior
1
birds
1
clutch size
1
clutch-size
1
collared flycatcher
1
costs
1
daily energy-expenditure
1
demands
1
energy-expenditure
1
future reproduction
1
great tits
1
incubation schedules
1
laying date
1
local climate
1
parus-major
1
reproductive effort
1
temperature
1
trade-offs
1
wood ducks
1
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