For more than 50 years, scientists thought that the horned anole lizard — sometimes called the “Pinocchio Lizard” for its long, protruding nose — was extinct. But it turns out this is a tall tale.
Scientists re-discovered the lizard in 2005, living elusively at the tops of tall trees in the cloud forests of Ecuador — the only place in the world that it is known to exist.
A team led by a Virginia Tech scientist recently uncovered new information about the role that the lizard’s long nose plays. Only the males have long noses, and they appear to be used in social interactions, both among males and between males and females.
Previous investigators had wondered if the nasal appendage served as a weapon of some sort in male-male interactions.
“It’s important that we learn as much as we can about the natural history, social behavior, and ecology of this lizard, in order to save it from true extinction,” said Ignacio Moore, an associate professor of biological sciences in the College of Science, a Fralin Life Science Institute affiliate, and a faculty member with the new Global Change Center at Virginia Tech.
Moore and his colleagues presented their findings at the 2015 Annual Meeting of the Society for Integrative and Comparative Biology in West Palm Beach, Florida. Quirola is now preparing an article about the findings.
While in Ecuador on research sabbatical, Moore partnered with Omar Torres-Carvajal, a faculty member at the Pontificia Universidad Católica del Ecuador in Quito, and Torres-Carvajal’s undergraduate student Diego Quirola.
Late at night, wearing head lamps and shimmying up trees, the team was able to catch a few dozen lizards. They held them in an outdoor facility built to mimic the lizards’ natural habitat and observed them for a couple days, after which the lizards were returned to the exact branch where they were found.
“We were able to observe and videotape 11 copulations and two male-male combat scenarios,” said Quirola. “The nasal appendage was not used as a weapon in these interactions but was used as part of the social displays. The appendage is lifted during the social interactions although what role this specific movement plays is unclear.”
What is becoming clear is that the appendage is an important part of their social interactions and a unique aspect of the natural history of this remarkable lizard.
“Ultimately we are interested in knowing about the evolution of this appendage, which is only found in two other species of anole lizards from Peru and Brazil. Do males with larger appendages dominate those with smaller ones? Do females prefer males with larger appendages? Did the appendix evolve under sexual selection? We hope to get some answers,” said Torres-Carvajal.
Since it’s rediscovery in 2005, the Pinocchio lizard is quickly becoming a commodity for its strange beauty and rareness, with pet smugglers offering large sums of money for its capture.
“It’s important for scientists to educate the public about the biological importance of this lizard. It is not a pet but a truly remarkable product of nature,” said Moore.
Listen as Charles Osgood interviews Dr. Moore:
Use of the proboscis during social interactions in the Ecuadorian Horned Anole, Anolis proboscis QUIROLA, D/*; MARMOL, A/; TORRES-CARVAJAL, O/; MOORE, I/T; Pontificia Universidad Católica del Ecuador; Pontificia Universidad Católica del Ecuador; Pontificia Universidad Católica del Ecuador; Virginia Tech
Sexual selection has resulted in numerous examples of exaggerated traits that often are the focus of investigation. These traits are typically used in mate choice, intra-sexual competition, or both. In males this can result in the evolution of exaggerated secondary sexual characters, which may be indicative of the animal performance. Anolis proboscis is a slow-moving cryptic species, endemic to the western slopes of the Andes in Ecuador that was rediscovered in 2005 after it was believed extinct for nearly four decades. Despite its rediscovery, most of the natural history of this species remains almost completely unknown. The males of the species (adults and neonates) have a laterally compressed, soft, flexible, fleshy nasal appendage which they can move at their will. We investigated use of the nasal appendage in social interactions. We captured free-living A. proboscis in the area surrounding the town of Mindo, Pichincha Provence, located on the western slopes of the Andes in Ecuador and conducted behavioral trials approximately 5 km away from the collecting sites. For each trial, two lizards (two males, or one male and one female) were placed on branches of a tree with two video cameras recording the interactions. We were able to observe and videotape 11 copulations and 2 male-male combat. The nasal appendage was not used as a weapon in these interactions but was used as part of the social displays. Further, the appendage is lifted during the social interactions although what role this movement plays is unclear. Our studies are providing new insights of the social behavior of this species as well as providing clues into the use of exaggerated sexually selected traits.
About the author
Lindsay Key is a lover of words, animals, and all things science. She works as a communications officer for Fralin Life Science Institute at Virginia Tech. Previously, she served as research communications specialist for the University of North Carolina at Wilmington, and journalist for The Roanoke Times. She holds a B.A. in English and Communications, MFA in Creative Writing, and is currently working on a master’s in natural resources.
Pinocchio lizard photograph (here and on homepage) thanks to: Santiago R. Ron-FaunaWebEcuador zoologia.puce.edu.ec/Vertebrados/anfibios/