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green anaconda
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A green anaconda (Eunectes murinus) with dark oval markings along its thick, olive-green body is coiled on muddy ground. Southern green anaconda (Eunectes murinus)
A green anaconda in Colombia
Underwater view of a green anaconda (Eunectes murinus) coiled on the bottom, showing its thick, spotted body and patterned scales. Illustration of a green anaconda (Eunectes murinus), a large, thick-bodied snake with olive-green skin and dark oval spots, shown coiled with its tongue extended.
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green anaconda: References & Edit History

Article Contributors

Primary Contributors

  • Michael McDonough
    Michael McDonough was a media team intern at Encyclopaedia Britannica. He is expected to graduate in 2023 from Northwestern University.
  • Sanat Pai Raikar

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Invalidated site: National Geographic - Animals - Green Anaconda. Oct 23, 2026
Add new Web site: The Open University - Open Research Online - Does the Southern Green Anaconda, Eunectes murinus, seek areas of high prey concentration in southeastern Peru? (PDF). Dec 19, 2025
Add new Web site: Denver Zoo - Green Anaconda (PDF). Aug 08, 2025
Add new Web site: Florida Fish and Wildlife Conservation Commission - Green Anaconda. Aug 22, 2024
Add new Web site: Frontiers - Frontiers in Ecology and Evolution - What determines demographic growth in green anacondas? Strong interactions among vertebrates in a neotropical ecosystem. Jun 26, 2024
Media added. May 21, 2024
Media added. Apr 24, 2024
New article added. Apr 22, 2024
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