# Screwworm's Decline and Resurgence Threatens Livestock

The screwworm, a parasitic fly nearly eradicated from North America through sterile insect techniques, has re-emerged in parts of the southern US and Central America. This resurgence poses a serious threat to livestock and wildlife, prompting renewed eradication efforts and concerns over climate change and border control impacts.

**Importance:** 3/5

## Sources

### Technology
- [Hacker News](https://www.construction-physics.com/p/the-fall-and-rise-of-screwworm) — Fri, 03 Jul 2026 12:58:47 +0000