ok so i dont know much about this but but im going to try my best.
so i did a bit of research about what all those birds have in common like you asked for and so they birds really dont have that much in common, so i went on a PREZI and i did some more reasearch i took some pictures to maybe help you.
im not sure if this helped if i didnt do it correctly just lemme know and ill do more research
ok so i added more research to this, look at the pictures, it is the EXACT answer to your question, if you need more research lemme know fam
The Coronary Arteries vessel directly supplies the Hear muscle with Blood.
23 pairs of chromosomes for a total of 46.
Hope it helps!
Answer:
You can determine something is living by classifying it if it has the seven characteristic of life