Coloration and pattern of Natrix natrix scutata documented by photos from iNaturalist. A Dark individual with orange collar; Nizhny Novgorod Oblast, Russia; photo: Evgenii Iaitskii. B Black individual with yellow collar; Bashkortostan, Russia; photo: Evgenii Samarin. C Marbled dark individual with pale orange collar; Tatarstan, Russia; photo: Denis Tishin. D Couple with yellow and pale orange crescents and mottled dark bodies; Kharkiv region, Ukraine; photo: Yehor Yatsiuk. E Grey individual with orange crescents; Simferopol region, Crimea, Ukraine; photo: Vyacheslav Luzanov. F Striped individual with whitish occipital coloration; Mazandaran, Iran; photo: Parham Beyhaghi.