Research provides strong evidence that pterosaurs were actually warm blooded (endothermic).
There is no clear evidence that dinosaurs were warm blooded.(Of course birds are warm blooded as well.)
http://en.wikipedia.org/wiki/Pterosaur
The presence of pycnofibres (and the demands of flight) imply that pterosaurs were endothermic (warm-blooded).http://dinosaurs.about.com/od/typesofdinosaurs/a/pterosaurs_2.htm
ancient pterosaurs and modern birds may have shared one important feature in common: a warm-blooded metabolism. There's evidence that some pterosaurs (like Sordes) sported coats of primitive hair, a feature usually associated with warm-blooded mammals, and it's unclear if a cold-blooded reptile could have generated enough internal energy to sustain itself in flight.http://biology.kenyon.edu/courses/biol241/bird%20flight%202005%20Feduccia_Alan.pdf
The basic themes of the new theropodan dogma
are that birds are living dinosaurs, that flight originated
from the ground up, and that feathers arose
as a downy insulative covering to insulate small
endothermic dinosaurs. Yet there has never been,
nor is there now, any clear evidence that dinosaurs
were endothermic (Feduccia, 1973, 1999a).
http://www.livescience.com/51162-dinosaurs-warm-blooded-growth-rates.html
When D'Emic doubled dinosaur growth rates and added birds into the calculations, the beasts ended up with growth rates that looked a lot like warm-blooded mammals, he said.
Moreover, the original study did not group birds with nonavian dinosaurs and Archaeopteryx (a transitional species between dinosaurs and birds) because they are substantially different.
http://science.sciencemag.org/content/344/6189/1268
Evidence for mesothermy in dinosaurs
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