Both Franklin Park Zoo and Stone Zoo are Sold Out Monday 4/19 and Tuesday 4/20. We hope you can visit on another day!

Know Before You Go: We've modified the Zoo experience in accordance with public guidance and health recommendations. Please review our FAQs (FPZ and SZ) before your visit. Members:​ Online reservations are required for your visit.

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Red-Tailed Boa

Boa constrictor ortonii

About the Red-Tailed Boa

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Geographic Range:

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Class: Reptilia
Order: Squamata
Family: Boidae
Genus: Boa
Species: constrictor

The red-tailed boa is named for its reddish tail, although it's primarily tan and brown. It's a large snake, growing as long as 10 feet and weighing up to 60 pounds. Since it's a constrictor and not venomous, it feeds by using its powerful coils to tightly constrict its victims, cutting off blood flow to the heart and causing death. The red-tailed boa’s jaw unhinges and stretches, allowing the boa to swallow medium-sized and large prey, after which it doesn't need to eat again for weeks or months.