I was having a browse through Wikipedia and noticed how even the rarest, hardest to find species of bird have comprehensive articles and comprehensive descriptions, but other species like the 1400 Andrena species have next-to-no information.
I tried to do a search for resources on individual species of Andrena bees but found very little - at best a short description and the name of the entomologist who described it. Is there a place I could go to find comprehensive resources on these bees? If not, why are the available resources on these species much less comprehensive than those on other species?