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→Egg laying and chicks
===Egg laying and chicks===
===Egg laying and chicks===
The beginning of egg laying varies depending on the respective distribution area. In China, the peak of egg laying around March 15; on the Kamchatka peninsula it usually takes place from the end of June to the beginning of July. Typically, the waters near the breeding colony at the time of egg laying have a surface temperature of between six and eleven degrees Celsius. The females usually lay two eggs, with the brooding period between 28 and 37 days. Unusual for a bird, the eggs are insensitive to brood interruptions, and offspring that have been abandoned for 24 hours still successfully hatch. Young birds are fed by their parents for up to a month, and are the only known bird species in which parental care and rearing is done entirely at sea<ref>https://www.allaboutbirds.org/guide/Ancient_Murrelet/overview</ref>. The success in time between egg laying and adulthood is unusually high in largely undisturbed breeding colonies. Eggs that have been incubated for at least 30 days hatch 96 percent of the young.
The beginning of egg laying varies depending on the respective distribution area. In China, the peak of egg laying around March 15; on the [[Kamchatka]] peninsula it usually takes place from the end of June to the beginning of July. Typically, the waters near the breeding colony at the time of egg laying have a surface temperature of between six and eleven degrees Celsius. The females usually lay two eggs, with the brooding period between 28 and 37 days. Unusual for a bird, the eggs are insensitive to brood interruptions, and offspring that have been abandoned for 24 hours still successfully hatch. Young birds are fed by their parents for up to a month, and are the only known bird species in which parental care and rearing is done entirely at sea<ref>https://www.allaboutbirds.org/guide/Ancient_Murrelet/overview</ref>. The success in time between egg laying and adulthood is unusually high in largely undisturbed breeding colonies. Eggs that have been incubated for at least 30 days hatch 96 percent of the young.
==Threats==
==Threats==