Milton, is a green-eyed, yellow toad. He is among the last of the golden toads, and as such, finds it difficult to meet potential mates. In The Song of the Cloud Forest, Milton searches for another of his kind, ultimately finding Ruth.
The golden toad (Bufo periglenes) was a real species that inhabited the cloud forests of Costa Rica. The species was classified as extinct in 1989, the same year Song of the Cloud Forest aired.