This site presents the idea that birds developed from pterosaurs.
This is a credible alternative to the current, mainstream idea that birds developed from land-based dinosaurs.
What ?!?!?! You're actually trying to use artists' reconstructions as hard scientific evidence?!?! Yes, pterosaurs look superficially like birds, but that's just convergent evolution. Champsosaurus looks a lot like a crocodile, but does that make it the ancestor of crocodiles? Definitely not.
You are becoming tiresome.
Rather than convergent evolution I am suggesting homology.