Find appropriate synonyms to replace the given bold words.
The scientists were perplexed by the strange antics of the birds.
The scientists were baffled by the unusual behaviors of the birds.
Complete the following task based on the instruction and optional input provided.### Instruction:
Find appropriate synonyms to replace the given bold words.

### Input:
The scientists were perplexed by the strange antics of the birds.

### Output:
The scientists were baffled by the unusual behaviors of the birds.