The smallest known species of dinosaur has been found in amber. It was the size of a bee hummingbird! https://www.washingtonpost.com/scie...mallest-dinosaur-ever-found/#comments-wrapper
Slightly inaccurate as (although cladistically it is of course a dinosaur) it seems to be more derived than the generally-accepted dividing point between avian and non-avian dinosaurs and hence is more accurately a bird, and moreover the long bony tail means it would have been longer and heavier than the bee hummingbird.
From a cladistic standpoint, though, isn't it more accurate that the bee hummingbird is actually the smallest known species of dinosaur? (Still a very cool paleontological event, thanks for posting @DavidBrown.)
....and now it seems that the original description reached some hasty conclusions and the amber fossil may in fact be a lizard
Is no-one going to mention other the controversy here? There's apparently a lot of questions surrounding how burmese amber finances the conflict within the area its found.