Nesting ~ Like My Birdie Friends???

My mommy woke up in a frenzy today. She decided today was the day that we would clear out my current playroom to make room for my new baby brother. My baby brother that won't be here for another three months, but I guess that is besides the point. My mommy had my daddy moving couches, tables and chairs and now my new playroom is in our living room, so now it is a living room/playroom. It turned out really nice if I do say so myself and now there is clear clean room for my brother's crib which I'm sure will be setup any day at the rate my mommy is going.
My daddy told me that my mommy was 'nesting' and that she did it with me also. Does this mean she is acting like the birdie friends that I like to watch so much in the yard? I'm not really sure what it means, but if she goes and gets me a worm for breakfast, I'm heading for the hills.