dead pine trees in a forest caused by the bark beetle.

tree forest plant woodland wilderness vegetation nature grass wetland leaf branch flower jungle spruce trail bark beetle barkbeetle blue borken borkenkäfer bugs change climate clouds cold damage dead death deforestation dutch ecological forst harz holes insects kafer kever killing landscape larvae letterzetter netherlands pest pine pne problem saturated schiermonnikoog schorskever scolytidae sky stumps trees wadden warm wet winter winters wood dark caused beetle