[qam1]

It is a lot easier for small animals (birds, mammals, lizards, etc.) to find themselves in sheltered and protected areas during firestorms and other such than it would be for multi-tonne critters. I can see birds surviving just by being in fortuitous and unexposed areas.

Not all Dinos were giants so what about the small Dinosaurs? Couldn't they have hidden also? Many of the mammals that survived them were bigger

[Junior]

Small dinosaurs did survive -- in the form of birds.

[Free Trapper]

If a few of each species survived,the critters that were able to find mates and establish viable breeding populations would have the best chance to multiply.

Flying species could have found others of their kind easier than the landbound.

Just a thought.