They use them to grab food.
All birds have claws - the equivalent of toenails
sharp claws,
they use their claws and teeth because they are both very useful
Cats are very useful because they can kill bugs or mice living in your house but they are also harmful, they have sharp claws that can give you cuts. To prevent it the claws can be cut every few months.
flamingos has no teeth
No, flamingos are birds.
yes flamingos do migrate
yes they live with other flamingos which is called a 'couple'.
There is no special word for a group of flamingos, they're a flock of flamingos.
yes
There are no flamingos that are naturally green.
There are about 1.5 to 2.5 million flamingos.