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How to Identify What Type of Bird is Nesting in Your Box, and Incubation and Fledge Timing

BIRD

NEST MATERIAL

EGGS

INCUBATION

FLEDGE (approx.)

EASTERN BLUEBIRD

Grass; pine needles

2 to 7 light blue or white eggs

12 to 14 days

15 to 20 days

TREE SWALLOW

Dried grass; feathers

4 to 6 white eggs; oval to long oval

13 to 16 days

16 to 24 days

TUFTED TITMOUSE

Bark; leaves; soft grass; snakeskin

4 to 8 white to cream; white speckled with brown

13 to 14 days

15 to 18 days

BLACK CAPPED CHICKADEE

Vegetation; moss; feathers; hair; insect cocoons

5 to 10 white eggs with fine reddish-brown marks; oval to short oval

11 to 13 days

14 to 18 days

HOUSE WREN

Box filled to top with small twigs-sticks; lined with hair; coccoons; fine grass

5 to 9 white eggs with brown flecks; short rounded to oval

12 to 14 days

14 days

HOUSE SPARROW

Grass; straw; cotton; trash; twigs; feathers

3 to 7 light green or blue eggs, dotted with grays and browns. Oval to long oval

10 to 14 days

14 to 17 days

Source: Ken Leister

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