There may have been four independent attempts at flight in theropod evolution. These would be:
- Troodontids (e.g., Anchiornis)
- Dromaeosaurs (e.g., Microraptor)
- Avialans (e.g., birds, including modern Aves)
- Scansoriopterygians (which involves bat-like characteristics)
What is this form of evolution called?
A. Convergent evolution
B. Divergent evolution