I like pic related because it creeps out 98% of anon, is practically harmless although it could sting like a motherfucker if it wanted to, and it's basically a giant wasp that's blood red.
the green represents reptiles, not dinosaurs.
all the reptilian dinosaurs are extinct. Warm blooded dinosaurs continue in the lineage of birds (light brown).
Likewise it shows mammals evolving from reptiles, but all the reptilian ancestors or mammals are extinct.
>practically harmless although it could sting like a motherfucker
There is no unique anatomical trait of birds that 'reptilian' dinosaurs lacked or weren't in the process of evolving, dinosaurs and birds are one and the same. There is no single distinction between a dinosaur and a bird that dinosaurs lacked. So at what point do you consider them separate from "reptilian" dinosaurs?
>There is no single distinction between a dinosaur and a bird that dinosaurs lacked.
you're the expert I guess.
>So at what point do you consider them separate from "reptilian" dinosaurs?
when they evolved things that other dinosaurs lacked. Pygostyle, keeled sternum, flight feathers, preen gland, whatever.
>many maniraptorans had wings
true since all birds are maniraptorans, but dubious otherwise.
wings have to be used for flight, or at least gliding. And right about when maniraptorans evolved flight (or gliding) is where we start calling them avialans.