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Warmer temperatures make invasive brown anoles more aggressive — Level A1 — A close up of a patch of green plants

Warmer temperatures make invasive brown anoles more aggressiveCEFR A1

17 Dec 2025

Adapted from Stacey Plaisance-Tulane, Futurity CC BY 4.0

Photo by Naoki Suzuki, Unsplash

Level A1 – Beginner
2 min
61 words
  • Brown anoles are invasive lizards in some places.
  • Green anoles are native lizards that live nearby.
  • The two anoles compete for the same spaces.
  • Researchers watched pairs of the two species.
  • They used small enclosures with different temperatures.
  • Warmer temperatures made brown anoles more aggressive.
  • Green anoles also became a bit more aggressive.
  • The aggression gap grew when it got warmer.

Difficult words

  • invasivespecies that spreads and harms local nature
  • nativeoriginal in an area; lives there naturally
  • competetry to get the same space or resource
  • researcherperson who studies and watches things for data
    Researchers
  • enclosuresmall closed area for animals or experiments
    enclosures
  • temperaturehow hot or cold the air or place is
    temperatures
  • aggressiveready to fight or act angry toward others

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Have you ever seen a lizard near your home?
  • Do you prefer warm or cool places?
  • Would you like to watch animals to learn about them?

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