Erythrism inkatydids has been occasionally observed. The coloring might be a camouflage that helps some members of the species survive on red plants.[4] There is also consensus that the erythristic mutation is actually a dominant trait among katydid species, albeit a disadvantageous one, due to the overwhelmingly green coloration of most foliage. Hence, most pink or otherwise vividly colored katydids do not survive to adulthood, and this observation explains their rarity.[5] Erythrism inleopards is rare, but one study[6] reported that two of twenty-eight leopards seen incamera traps in a South African nature reserve were erythristic, and the authors found records of five other "strawberry" leopards from the region.[7]
^Dariusz Bukaciński and Monika Bukacińska (1997), "Production of Erythristic Eggs by the Black-Headed Gull in Poland",Wilson Bull.,109 (1), Wilson Ornithological Society:177–182,JSTOR4163790
^Helen Hays and Kenneth C. Parkes (1993), "Erythristic Eggs in the Common Tern",J. Field Ornithol.,64 (3), Association of Field Ornithologists:341–345,JSTOR4513830
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