Q: We noticed this pretty bug on the side of our car. The bug was gesturing at us with its antennae and abdomen.

A: It just wanted to be friendly!

It’s a nymph (i.e. juvenile) of a leaf-footed bug, Acanthocephala terminalis.

It’s a minor pest of fruits, nuts and vegetables. It is typically controlled by other insects so you need do nothing except enjoy their presence.

See

Leaf-footed bug nymph

Leaf-footed bugs