Whatbird.com

Generally when you see flocks like they are starlings.

As far as just passing through, titmice generally stay pretty close to the area they were raised there whole lives, according to what I have read on them. With any luck you will have a new regular at your feeder! 

You all have really been an invaluable tool, even when I had weird ecuadorian birds, you all came through. I think we should just settle to say that most of us are most familiar with North American birds, and will probably be most helpful in identifying those, but I don't personally think we should make someone feel unwelcome for posting a ...

Also called superb parrots http://www.avianweb.com/images/birds/parrots/superb2.jpg 

I think she is a female barraband parakeet by your description, look up some pictures of the female barrabands, the males look much different. That is not a very common bird, you may want to consider finding a male and breeding her.  Edit: Unless you are in Australia, then she is a rather common bird, most likely.  

She reminds me a lot of a canary winged parakeet, but I don't believe she is. She is not a lovebird.... I will look this up and get back to you. 

What is really neat is that hummingbirds time their spring arrival not with flowers coming into bloom, but with the arrival of sap suckers!  In colder climates of course... not like you lucky folks that have hummingbirds all year round... here we only get the Ruby Throat... sigh... I want to migrate south too...  

A not so great picture of a pair of oystercatchers in June 2009 on Bartholome, Galapagos, Ecuador.  In defense of the poor camera work... I was currently snorkeling, and shot that with a canon d10 waterproof point and shoot model.... pretty good considering it was on an underwater setting....  and I was in the water. Also, shortly after ...

Looks to be a red factor canary, probably an escaped pet, if you can catch it, do so, it probably wont make it long in the wild. 

Can't hear the sound either, but there sure are A LOT of loud birds native to Australia, Cockatoos, other parrots... the kookaburra Snowy suggested... Try to get a picture of him if you can...