B. flavescens may refer to:
Bachia flavescens, a spectacled lizard Baritius flavescens, a Brazilian moth Bembicium flavescens, a sea snail Bembix flavescens, a sand wasp Berchemia flavescens, a climbing plant Bittacus flavescens, a hanging fly Boissonneaua flavescens, a South American hummingbird Bombus flavescens, a social insect Brachodes flavescens, an Italian moth Brachyopa flavescens, a flower fly Bulbophyllum flavescens, a flowering plant