It is not. Grackles are smaller than crows. They possess a keeled tail, and yellow eyes, and their iridescent feathers flash different colors including purples, browns, bronzes, blues, grays and ...

Cornell University and NVIDIA researchers team up to build better appearance models for biological iridescence using bird feathers.

Computer animators and video game designers may soon have a better way to create the purple-green sheen of a grackle's wing, or the pink flash on a ...