the Moa
There is some areas in New Zealand that no one travels to, so yes it is possible for new species yet to be found, or re-found in some occasions like the Huia.
i don't know ;p ha ha 1 answer that is definitely correct is the dodo bird (it is extinct already)
Weka,Kiwi,Kakapo That's all I know.
Currently, there is absolutely no foreseeable reason for all birds to become extinct. There are around 10,000 known birds alive on Earth today, and we only know of about 4,500 mammals. So birds are quite successful. However, I do doubt that people, if they had existed 65.5 million years ago, could have predicted the extinction of the dinosaurs unless they would've seen the asteroid coming with a telescope.
Although quite famous, the Dodo is sadly not the only extinct bird. It had been calculated that since the year 1500, over 190 species of birds had disappeared from the face of earth forever, among them the aforementioned Dodo, the Elephant bird, the New Zealand Quail, the Red Rail and the Bermuda Night Heron.
People don't think dinosaurs are extinct. People know they are. At least the ones you are referring to. Perhaps you would like to be more specific. Birds could be an evolution of a dinosaur as i think though.
Because the early birds found ways to build nests. Birds know how to build nests so they can survive in this way until today. It is the natural selection.
scissor sharks are extinct and the answer is not this ( because, i dont know)
the birds know it by heart
The dodo bird was a bird that could not fly and it is now extinct. This birds closest living relative is a pigeon and their skeletal features were almost identical to that of the pigeon.
They don't, as they are extinct. I can find no reference to anyone's studying this when they were alive. We don't really know how long birds sleep. It varies with species and habitat, but they don't seem to need it like we do.
Yes there is one green maml that I know of belonging to the parrot family and that is the "kea", only found in New Zealand