Nymphargus grandisonae (common name: giant glass frog, red-spotted glassfrog) is a species of frog in the Centrolenidae family.It is found in Andes of Colombia and Ecuador.Its natural habitats are tropical moist montane forests (cloud forests); larvae develop in streams and still-water pools. Its habitat is threatened by habitat loss, introduced fish, and agricultural pollution, but it is still a common species not considered threatened by the IUCN.