Use the following rocks to get the corresponding bug.

Azure Bug: At the Raw Food area and Vine area rocks.
Black Bug: At the Raw Food area, Vine area, Canoe End area and Easel area rocks.
Blue Bug: At the Raw Food area and Canoe End area rocks (Perfect).
Brown Bug: At the Sewing area rock.
Fuchsia Bug: At the Vine area rock (Perfect).
Green Bug: At the Vine area (Perfect) and the Easel area rocks.
Jade Bug: At the Easel area rock (Perfect).
Orange Bug: At the Sewing area and Easel area rocks.
Pink Bug: At the Vine area rock.
Purple Bug: At the Canoe End area rock (Perfect).
Red Bug: At the Canoe End area rock.
Tan Bug: At the Sewing area rock (Perfect).
Turquoise Bug: At the Sewing area Rock (Perfect).
White Bug: At the Raw Food area and Canoe End area rocks.
Yellow Bug: At the Sewing Area and Easel area rocks.