Large Black Slug (Arion ater agg) showing breathing pore. Obviously, this one is not black, but the species has a number of different coloured varieties. This one being chestnut in colour with an orange frill. Climbing glass panel. Farnham, Surrey, UK, 6 September 2008.

Canon EOS 400D with Tamron Adaptall-2 SP 90mm F/2.5 (model 52BB) lens.

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