Gulf Islands snails on the run in a heat wave

2021 August 8 cf Pacific Sideband snail, Monadenia fidelis, Hwmet’utsun, Salt Spring Island * P8080017

Two snails were studied on August 8, 2021 in the Hwmet’utsun conservation area on the wild West Coast of Salt Spring Island in the territory of Cowichan Tribes. After a six week heat wave, linked to climate change, it can be assumed that the native snails of the Gulf Islands could have a difficult time surviving. These two snails could be out and about because there was light rain 36 hours before and there were droplets of rain under the otherwise dry arbutus leaf litter. These snails are probably the most common native snail on the Gulf Islands, the Pacific sideband snail, Monadenia fidelis, but there is a possibility that the second video is of a much rarer, Puget Oregonian snail, Cryptomastix devia (which has a pronounced, curled-up lip on the aperture of the shell). Along with hotter temperatures and more erratic rainfall patterns, native snails are vulnerable to terrestrial acidification from pollution sources nearby and across the North Pacific.