How do Birds Stay Warm in Winter?

It is cold outside during winter in the Rocky Mountains and before my owner takes me outside for a walk he always grabs a nice, warm coat.  That coat keeps him warm during the cold temperatures. Luckily for me I don’t need to put on a coat since I am already wearing a nice coat of fur.

I wonder how other animals stay warm during winter?  What about  birds?  I know that in the fall there are a lot of birds that go south for winter – so their strategy to stay warm is to migrate.  But, not all birds migrate.  How do those birds that stay in the Rocky Mountains during winter stay warm?  Here is a fun nature fact for you. Continue reading