Common sunflower field Helianthus annuus Cornflower Centaurea cyanus wild herbs Buff-tailed bumble bee Bombus terrestris Apidae Insects Colony Collapse Disorder CCD Butterfly Butterflies Food Diptera pollinate pollination nectar yellow landscape plant agriculture farming farmland food forage crop pesticide protection fallow ground blue colorful clouds sky blooming blossom Hesse Germany September Autumn autumn Europe feeding animal animals Pellorneidae Fulvettas Ground Babblers