The eggs are a pale bluish green with few black spots and a smooth somewhat glossy surface.
Backyard bird egg identification.
More guides resources john james audubon s birds of america.
Birders are naturally curious to identify the birds they see and identifying bird eggs is part of that curiosity for birdhouse landlords identifying eggs can help them understand which birds prefer their houses and they can adjust the foods they offer and how bird friendly their yard is to better suit each feathered family.
These traits can help you identify the species even if the bird itself isn t present.
In general bird egg shells are made of calcium carbonate and so the default colour is white.
Eggshells don t just fall out of a nest.
Backyard bird identification guide american crow.
We have photos song recordings in depth entries and more to help bird watchers correctly identify the birds they spot.
The female incubates the eggs for 12 to 14 days and the young leave the nest about 11 to 19 days after hatching.
The surface of eggs laid by wild backyard birds have a remarkably wide variety of textures.
Some wild backyard bird eggs have ridges and ripples.
But other pigments can create different colours and patterns.
Western bluebird ash throated flycatcher tree swallow house sparrow oak titmouse house finch american kestrel ruby throated hummingbird american robin carolina wren northern cardinal and northern mockingbird.
Predators such as foxes or magpies may carry them away as do parent birds often to help conceal the location of vulnerable babies.
Or you can use our backyard bird identification guide below to help you.
Eggs are laid from february through august two or more broods per year with 2 to 6 eggs per brood.
What bird is that.
Many of them are smooth but just as many can be covered in tiny dimples or feel pebbly.
Bird species use different building materials to create nests of various shapes and sizes and the eggs they lay differ in shape markings colors and size.
Consult our bird identification guide to id mystery birds in the backyard and beyond.
Bird egg and nest identification with photos and comparisons.
Then you can later check your field guide to try and identify the bird armed with all the information you need.
Eggs can also be glossy or have a duller matte finish.
Why bird egg identification matters.
The audubon bird guide is a free and complete field guide to more than 800 species of north american birds right in your pocket.