Philippe Clement / European dipper (Cinclus cinclus) perched on rock in stream and looking around, Luxembourg, April.

Philippe Clement / European dipper (Cinclus cinclus) perched on a rock at the base of a waterfall and bobbing, Luxembourg, April.

Michel Poinsignon / Two tawny owl (Strix aluco) chicks emerging from nest in tree, Luxembourg. May.

Philippe Clement / Tachina flies (Tachina fera) nectaring on Umbellifer (Apiaceae) flowers in summer, Luxembourg, August.

Philippe Clement / European toad (Bufo bufo) looking for shade in a forest, Luxembourg, April.

Philippe Clement / Close-up of a male Slow worm (Anguis fragilis), smelling with tongue, Luxembourg, April.

Philippe Clement / European dipper (Cinclus cinclus) perched on rock in stream and bobbing, Luxembourg, April.

Philippe Clement / European dipper (Cinclus cinclus) perched on rock in stream and bobbing, Luxembourg, April.

Philippe Clement / Strict-branch coral / Upright coral fungus (Ramaria / Clavaria stricta) on the forest floor, Luxembourg, August

Philippe Clement / Strict-branch coral / upright coral fungus (Ramaria / Clavaria stricta) on the forest floor, Luxembourg, August

Philippe Clement / Giant puffball (Calvatia gigantea / Langermannia gigantea) on the forest floor in late summer, Luxembourg, August

Philippe Clement / Robin's pincushion gall, caused by the gall wasp (Diplolepis rosae) on Dog rose, Luxembourg, August