Xeme seem like sea mew, like daytime life, once the polar night coming in south pole, they will fly to the north polar, for at this time, here is day time.
They will lay egg and sitting on Jun each year and fly to south polar on Aug with their children. Reach south polar on December and stay in there till March next year. They need fly more than 40000km each year.
Xeme sometimes live alone, sometimes live together. Find foods along with the coasting.