Give some examples of the differences between the species of birds and how these differences affect the survival and competition between the birds?

Birds can differ from each other in many ways. Different species differ in both size and appearance along with instincts and ways.

Birds of the same species can differ from each other just the same way as humans. E.g each person is different in their own way due to attitude, colour and thought. It's exactly the same.

Many birds have hooked beaks, many have beaks for siphoning water and others have beaks for catching insects. Their diet varies beyond group species as do their appearance. Many birds may look the same but they each differ in thought, language, colour, size and diet.