Conservation Lost forest bumble bee returns in the Netherlands (Nature Today, in Dutch) The forest bumble bee (Bombus sylvarum) was observed by students during a monitoring study that is part of the Geuldal Forest Bumblebee initiative. This is a partnership of eleven parties that manage nature areas, water buffers, roadsides, field margins and hedges in the Geul Valley. The initiative was named after the species that disappeared from the landscape and is a symbol of biodiversity restoration.