whales migrate there and seals live there year-round
Arctic Terns live in Northern and Southern Hemispheres.
The only mammal that can survive in Antarctica all year is a human mammal.
The Arctic Tern (Sterna paradisaea) does migrate from the arctic to the antarctic. The 24,000 mile round trip is the longest migration of any animal.
Antarctica. Further information: Whilst it is true that you can see icebergs in Antarctica all year long, Antarctica is a continent, not a country. Iceland has ice all year round, and icebergs are evident even in Summer.
It seems like the season of what year-round in Antarctica?
Presumably snow, but in places like Antarctica they have snow and ice year round. Therefore, I am unsure about the exact answer to this question, but I stick with snow.
Lemurs are generally not known to migrate. They tend to defend their territories year-round.
If Killer Whales are in Antarctica then they probably live there year round. Killer Whales don't migrate unless forced to because of their prey migration but they don't go far. They will also move based on the seasonal advancements and retreat of packed ice.
bobcats do not hibernate or migrate they are active all year round
They do not hibernate or migrate. They stay in the same area year round.
In the NE usually in the spring and summer months when it is warm and flowers are in bloom. In the Western states some hummingbirds stay year round if there is enough food available. In places where they can't stay year round they migrate south where it is warmer.
It is cold there year-round.