Burmese Pythons in the Everglades: 100,000+ Invasive Constrictors Reshaping an Ecosystem

The Burmese python (Python bivittatus) population in the Florida Everglades is estimated at **100,000–300,000+ individuals** — one of the world's most severe invasive reptile crises.

How They Got There

• Pet trade releases: 1980s–2000s; hurricanes (Andrew 1992) destroyed breeding facilities
• Established by 2000: Breeding confirmed in Everglades National Park (ENP)
• Genetic evidence: Multiple introduction events; hybrid vigor possible

Why They Thrive

Ecological Devastation

• Mammal declines (ENP road surveys 2003–2011): Raccoon -99.3%, Opossum -98.9%, Bobcat -87.5%, Rabbit/fox — **extirpated**
• Bird impacts: Wading birds, ground-nesters; eggs/chicks vulnerable
• Competition: Native predators (panthers, gators, raptors) lose prey base
• Disease vector: Pentastome parasites (Raillietiella orientalis) → native snakes

Control Efforts

• Python Elimination Program (SFWMD/FWC): Paid contractors — 18,000+ removed (2017–2024)
• Python Challenge: Public hunt (1,000+ participants); 200+ snakes/event
• Detector dogs: 2.5× human visual detection
• Judas snakes: Telemetered males lead to breeding aggregations
• eDNA monitoring: Early detection in new areas
• Research: Toxicants (acetaminophen), traps, reproductive suppression

Outlook

Eradication unlikely. Goal: suppression in key areas (wading bird colonies, panther habitat). Everglades restoration (water flow) may alter habitat suitability. The python is now a **permanent, keystone-invasive** species.