Most helpful for identifying snakes and lizards in the field are his comparisons of similar species and his comprehensive key. Superb photographs by Suzanne Collins of adult and, when needed for ...

The study analyzed 96 Anolis cristatellus lizards, comparing the genetic makeup of forest-dwellers to those living in Puerto Rico’s capital, San Juan, as well as the northern city of Arecibo and ...

SAN JUAN, Puerto Rico — Lizards that once dwelled in forests but now slink around urban areas have genetically morphed to survive life in the city, researchers have found.

Where I live in Florida, I can’t open the door without causing a gecko or another lizard to skitter away. They’ve never complained. But maybe I haven’t been listening. Elizabeth St. John ...

Scientists knew that lizards, which bask in the sun for warmth, are vulnerable to climate change. A new study suggests the hazards are more complicated, and possibly worse, than previously believed.

The Puerto Rican crested anole has genetically morphed from being a forest lizard to being able to survive in the city. The animals now have special scales to climb smooth surfaces.