During our April holiday in Perthshire, we also revisited the town of Alyth and its eponymous Den. This steep-sided valley is an absolute joy to wander around, with its Ash and Beech trees, and fast-flowing burn. Sadly, due to the wet Winter, several landslides had closed some of the paths. However, we were able to navigate the remaining paths in a convoluted route to make the most of the site's wonderful wildlife. Blue, Great and Coal Tits sang as they foraged through the canopy. Nuthatches and Treecreepers called from boughs and trunks. Wood Anemone and Wood Sorrel coated the valley floor, along with Lesser Celandine and Greater Stitchwort. Dippers and Grey Wagtails frequented the burn, whilst Green-veined White, Comma and Speckled Wood butterflies basked in sunny glades. At the lower end of the Den, is an open area where the base of a low cliff is fringed with wildflowers. Here were more species of insect: Orange Tip, Peacock and Red Admiral butterflies, Dark-edged Bee-flies and...