Bernard Castelein / RF-Robin (Erithacus rubecula) singing, Brasschaat, Belgium, January. (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF-Robin (Erithacus rubecula) on a snowy branch, Brasschaat, Belgium. January. (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF- Great spotted woodpecker (Dendrocopus major) perched. Brasschaat, Belgium (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF-Common Frog (Rana temporaria) froglet on discoloured water lily pad, Brasschaat, Belgium, June. (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF- (Pinus sylvestris) at sunrise, Klein Schietveld, Brasschaat, Belgium (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF- Bog myrtle (Myrica gale) in mist, Groot Schietveld, Wuustwezel, Belgium, April. (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF- (Quercus robur) in (Molinea caerulea) with moon, Groot Schietveld, Wuustwezel, Belgium (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF- (Pinus sylvestris) around sunrise, Klein Schietveld, Brasschaat, Belgium (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF-Field of Poppies (Papaver rhoeas) De Inslag, Brasschaat, Belgium (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF-Black Spider Monkey (Ateles chamek) climbing tree, Madidi National Park, Bolivia (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF-Vicuna (Vicugna vicugna) mother with calf, Laguna Hedionda, Altiplano, Bolivia (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / RF-Vicuna (Vicugna vicugna) Quetena, Altiplano, Bolivia (This image may be licensed either as rights managed or royalty free.)