Frans de Waal - Public Page - FROGGY Sometimes referred to as 'thumbnail frogs'... Imitator Poison Frog (Ranitomeya imitator 'chazuta'). Photo posted by Twan Leenders facebook.com/twan.leenders.9 | Facebook
File:Flickr - ggallice - Green and black poison dart frog (2).jpg - Wikimedia Commons
Josh's Frogs - This is why we often refer to our smaller species of dart frogs as "thumbnails". https://www.joshsfrogs.com/frogs-for-sale/all-poison- dart-frogs/thumbnail-dart-frogs-for-sale-1.html | Facebook