Sticks

Beavers Castor canadensis with beaver dam.  Illustration based in Tierra del Fuego, where introduced beavers have damaged the closed ecosystem. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Common Alder Alnus glutinosa Cones and catkins pencil study with outline of the leaf behind

Common Alder Alnus glutinosa roots showing their distinctive growth habit

Common Alder Alnus glutinosa tree, pen and ink study of a tree in full leaf

Pollarded Alder Alnusglutinosa tree in leaf

Different fencing types and shapes suitable for erecting in a garden

Salt marsh landscape showing mud and a cross section of the snails and invertebrates who live here, wading and predatory birds above in the glasswort and aquatic plants; further away from the salt estuary are soft cliffs and the distant sea