There's a hummingbird that laid 2 eggs on the tree outside my apartment. It hatched and everything was going great until I realized that the mother bird had not come back for 3 days. One baby bird died this evening. I removed it from the nest. There is one left. I was able to pull down the branch to take a quite look... not good, very very thin. What do they eat? If I could, I want to save it.