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Invasive Species
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General Resources

Large Constrictor Snakes

Burmese python

Burmese python caught at Everglades National Park. Photo credit USGS.

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Current Situation

June 23, 2014

The U.S. Fish and Wildlife Service is re-opening for 30 days the comment period on a proposed rule to list nine species of large constrictor snakes as injurious under the Lacey Act. Because four of the nine snakes were listed as injurious in 2012, this re-opening notice is restricted to the five remaining snakes: the reticulated python, DeSchauensee’s anaconda, green anaconda, Beni anaconda and boa constrictor.

Re-opening the comment period will provide the opportunity for the public to provide new information that may have become available since the original public comment on the proposed rule closed approximately four years ago. This comment period will help ensure that any final decision on the five remaining snakes is based on the most current information.

Under the injurious wildlife provisions of the Lacey Act, the Secretary of the Interior is authorized to regulate the importation and interstate transport of species determined to be injurious to human beings, the interests of agriculture, horticulture, forestry, or to wildlife or the wildlife resources of the United States.

The Federal Register publication of this notice is available at The public may provide comments by going to and locating docket number FWS–R9–FHC–2008–0015. The Service will post all comments on This generally means the agency will post any personal information provided through the process. The Service is not able to accept email or faxes. Other methods of providing public comments are available in the Federal Register publication.

The Service will consider comments that are postmarked on or before midnight of July 24, 2014. Anyone who submitted comments during either of the previous comment periods in 2012 need not resubmit them because the Service has already incorporated those comments in the public record and will consider them in its final decision on these remaining five species.


Listing the Large Constrictor Snakes as Injurious Wildlife

June 24, 2014 – Reopening of Public Comment Period for Proposed Rule
Listing the Reticulated Python, Three Anaconda Species, and the Boa Constrictor as Injurious Reptiles

January 23, 2012 – Final Rule Listing
Action: Listing Three Python Species and One Anaconda Species as Injurious Reptiles

July 1, 2010 – Reopening of Public Comment Period for Proposed Rule
Listing the Boa Constrictor, Four Python Species, and Four Anaconda Species as Injurious Reptiles

March 12, 2010 – Public Comment Period for Proposed Rule
Listing the Boa Constrictor, Four Python Species, and Four Anaconda Species as Injurious Reptiles

January 31, 2008 – Public Comment Period for Notice of Inquiry
Review of Information Concerning Constrictor Snakes From Python, Boa, and Eunectes genera


Multi-Stakeholder Python Action Workshop - December 10, 2008

A series of three multi-stakeholder workshops have been held to discuss the large constrictor snake threat, develop action items, and share research information/results. Goals for invasive snake management include prevention, eradication, containment, and reduction of snake populations.

Workshop Documents


Miscellaneous Information




Report Invasive Species

Did You Know?

  • Florida has more nonnative reptile and amphibian species than anywhere else in the world.
  • More than 80% of the nonnative reptiles and amphibians in Florida arrived here through the pet trade.
  • There are more species of nonnative lizards breeding in Florida than native lizards.
  • Invasive plants and animals cost Floridians more than $500 million each year.
  • Invasive species are the second-leading cause of species endangerment and extinction, after habitat loss.

What Can You Do?

  • Do your research before buying exotic pets, and remember, Don't Let It Loose!
  • Learn to identify invasive nonnative species and report sightings at or 1-888-IVE-Got1 (1-888-483-4681).
  • If you have an exotic pet you can no longer care for, contact the Pet Amnesty hotline at 1-888-IVE-Got1 (1-888-483-4681).
  • Inspect boating and fishing equipment and remove any plants and animals before going home.
  • Learn about laws and regulations regarding nonnative species at

For more information about invasive species in Florida and tips on how you can help, visit

Last updated: July 23, 2014
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