Bluebird eggs are typically light blue in color, often described as lighter than robin's egg blue. This is the common color for eggs laid by Eastern, Western, and Mountain Bluebirds, with about 97% of bluebird eggs being light blue
. However, it is not unusual for a small percentage of bluebird eggs to be white or pale pink. Studies and observations report that 2-9% of bluebird eggs can be white, sometimes with a slight pink or blue tinge, and less than 1% may be pink. These white or pink eggs usually hatch successfully and are considered a normal, though rare, variation rather than a cause for concern
. In summary:
- Most bluebird eggs are light blue (about 90-97%).
- A small percentage (2-9%) are white, sometimes with a slight tint.
- Very rarely, eggs can be pale pink (less than 1%).
All eggs in a single clutch tend to be the same color, either all blue, all white, or all pink
