This is a Confuciusornis. Over 100 fossils of these beautiful fork-tailed birds have been discovered. They lived in what is now the southern USA and Asia.
Here is a depiction:
This seemingly harmless knee-high dino-bird might have had a secret weapon. Groves have been found in the teeth which suggest it was venomous.
Microraptor had two pairs of wings: one on the arms and one the legs. Pigments in the fossil revealed it had iridescent black feathers. It ate fish.
This fossil was found in Germany, and was a big win on the theory of evolution, as it was a transition-phase creature. Its wing and tail feathers were beautifully preserved.
This fossil was a lucky find in the amber markets or Myanmar. It was a tail that sported perfectly preserved proto-feathers. It came from a small dino like this: