Can chickadee eggs take over 16 days to hatch?

Chickadee eggs typically hatch within 12 to 14 days after the female begins incubating them. While it is uncommon for the incubation period to extend beyond 16 days, factors such as temperature, humidity, and overall health of the eggs can influence hatching times. If eggs do not hatch within a couple of weeks past the typical period, it may indicate an issue with viability.