Approximently how many dinosaurs were there?
Approximately 700 species have been named so far, although
recent research suggests that half of these have not been
sufficently differentiated from existing species. Recent studies
have estimated that there are still 700-900 more genera to be
discovered, and many more species in the existing 540 genera.
As far as the number of dinosaurs as individuals, recent finds
in Alberta indicate that the Centrosaurus and Styracosaurus
travelled in herds of hundreds if not thousands. This makes
dinosaur numbers like the numbers of wildebeast in the old African
movies or buffalo on the North American plains.