How long is a long tongue?
Edwards and Jenner describe the tongue of the Buff-tailed Bumblebee (B. Terrestris) as ‘very short’ and that of the Common Carder (B.Pascuorum) as ‘long’. Worker bees of both species have been visiting my nasturtiums this year and sometimes both hover with tongues out a little way from the flower before going in. To me the tongues seem to be about the same length, (roughly a centimetre). Can anyone give me a guide as to the length of a long or short tongue? I’m still trying to catch one with tongue out on camera!