Fig. 7From: Color vision evolution in egg-laying mammals: insights from visual photoreceptors and daily activities of Australian echidnasEthogram-based frequency of each behavioral category in comparison between the light and dark conditions. a individual Shou. b individual Dai. Abbreviations: PB, Primary behavior; Tr, Traveling; Hl, Halting; Sc, Searching; St, Self-treatmentBack to article page