Don't point your finger at me quite yet!

I know I know it makes you people mad when people post things in the same day but I got to write this down before I forget. I have been noticing a change in bird activity lately during my visits to the realm of nature. Mostly the noise level has changed drastically from the winter months. Maybe I'm wrong but it seems now that the weather is getting warm again the noise level is rising. Maybe it's because the birds migrated, maybe the birds have been preserving energy in order to survive winter, maybe the birds are just happy it's warm, maybe it's because it's mating season? I don't really know. Now before you people start pointing your fingers at me and calling me crazy just hold on. I am now going to the Google search engine to ask my query. And the results of Google are the following titles in order. Boisterous Blue Jays Chickens Losing Feathers Where Do Birds Sleep at Night And my favorite How to keep you neighbor quiet So much for Google, oh well seems that I'm just going to have to take the maybes above and just assume that one of them is right. The Internet needs to get on board with science and help us people who don't understand everything about it. It could also be how I worded my question. So anyway please comment back and give me you opinion on why the birds are noisy again. :) this is a serious query, no joke.