Cluster of insect eggs (likely stink bug or butterfly)

Typically found on the underside of leaves, garden plants, or outdoor fabrics/structures

Eggs do not eat; emerging nymphs or larvae will consume host plant material or small insects depending on the species

Laid in tight geometric clusters for protection and synchronized hatching; they remain stationary until hatching

Generally harmless to humans; if they are stink bugs, they can be agricultural pests; if butterflies, they are beneficial pollinators.