Identifying a Volunteer Squash or Gourd: Safe to Eat?

Introduction

A mystery vine with yellow/green striped fruit likely came from compost or bird-dropped seeds.

Likely a Squash or Gourd from Compost or Birds

Large, hairy, serrated leaves and thick vines indicate a cucurbit (squash/gourd family).

Edibility Test by Taste

Taste a small piece. If it tastes good (not bitter), it's likely an edible squash. Gourds are bitter and inedible.

Conclusion

Volunteer cucurbits are usually safe if they taste good. Bitter = gourd = discard.