Editing Bee (section)

=== Nocturnal bees ===
Four bee families ([[Andrenidae]], [[Colletidae]], [[Halictidae]], and [[Apidae]]) contain some species that are [[crepuscular]]. Most are tropical or subtropical, but some live in arid regions at higher latitudes. These bees have greatly enlarged [[ocellus|ocelli]], which are extremely sensitive to light and dark, though incapable of forming images. Some have refracting superposition compound eyes: these combine the output of many elements of their compound eyes to provide enough light for each retinal photoreceptor. Their ability to fly by night enables them to avoid many predators, and to exploit flowers that produce nectar only or also at night.<ref>{{cite journal |last1=Warrant |first1=Eric J. |title=Seeing in the dark: vision and visual behaviour in nocturnal bees and wasps |journal=Journal of Experimental Biology |date=June 2008 |volume=211 |issue=11 |pages=1737–1746 |doi=10.1242/jeb.015396 |pmid=18490389|doi-access=free |bibcode=2008JExpB.211.1737W }}</ref>