You're supposed to look for bugs, not dandelions.
5 seconds sound clip from the A Bug's Life movie soundboard.
You can hear this line at 00:19:04 in the Blu-ray version of the movie.
Quote context
[...]
- Hey, hey, hey. Ease up, all right? Come on. She's entitled to her opinion, too.
- I know.
- You're supposed to look for bugs, not dandelions.
- You leave him alone. He knows what he's doing.
- Here I go. For the colony, and for oppressed ants everywhere!
- Wow!
- Hey!
[...]