Date: November 4, 2016
Source: Okinawa Institute of Science and Technology Graduate University - OIST
During his notable trip to the Galápagos Islands, Charles Darwin collected several mockingbird specimens on different islands in the region. He later discovered that each island only contained a single species of mockingbird and no two species of mockingbird co-existed on an individual island. Due to their geographical separation, over time these birds had evolved different characteristics in coloration, behavior, and beak shape. These observations raise the question: how does a geographical region influence the evolution of a species?
Tropical birds are well known for their colorful appearance: vibrantly colored macaws, parakeets and parrots are widely considered to be the quintessential birds of this region. The popularity of these birds leads many to assume that tropical climates are home to a greater proportion of colorful birds than temperate climates. But do birds evolve to become more colorful when they move to the tropics? Research from Dr. Nicholas Friedman, who is part of the Biodiversity and Biocomplexity Unit at the Okinawa Institute of Science and Technology Graduate University (OIST), helps answer this question.