Cat and bird

I'm not real sure what's happening with my house finches. The first pair I think is gone along with their 2 baby birds. I think that other pair in the corner nest took over the general area but it's harder to see and I haven't seen them flying in or out so much. Sunday I saw some kind of baby bird sitting near my patio. I think it was a baby robin but I'm not sure. It sat there for a long time chirping loudly every so often in sort of a helpless baby bird way.
I recently adopted Becky's cat Socks. I thought about changing his name to something else but he's already about 8 years old I guess. I have no real reason to do that. Tonight in fact I'm going to buy some cat litter for the first time. Socks likes to watch all the activity with the finches and other birds out in the yard. I think he'll enjoy it when the Sandhill Cranes come back this summer.