Spring Breeding Season Bluebirds generally begin their nesting season in early spring, when temperatures start warming up.
Timing of Egg Laying Female bluebirds typically lay eggs between late March and early May, depending on the climate.
Nest Site Selection Bluebirds prefer to nest in cavities, such as tree hollows or birdhouses, often near open fields.
First Clutch of Eggs The first clutch of eggs is usually laid within a week after the female chooses a nesting site.
Egg-Laying Frequency Bluebirds often lay 3 to 5 eggs in a single clutch, although the number can vary.
Incubation Period After the eggs are laid, the female incubates them for about 12 to 14 days before they hatch.
Nest Building Both male and female bluebirds contribute to the nest-building process, using grass, twigs, and feathers.
Multiple Broods Per Year Bluebirds may have 2 to 3 broods in a single breeding season, depending on food availability.