A poster outlining distinguishing features of bees, wasps and flies. Click on the image to see it full sized.
This video shows a honey bee along side a group of wasps, and illustrates some of the latter's eating habits (warning this video is a little graphic):
Check out this citizen scientist pollinator monitoring guide for more details on the differences between bees, wasps, and flies.
There's also a great video here that offers a fascinating overview of the many different types of bees.
Intro: Blue by Louise Docker (CC-BY) • Native bee by Nuytsia@Tas (CC-BY-NC-SA) • Female Metallic Green Bee by sankax (CC-BY-NC) • Nomade -- Cuckoo Bee by Gilles Gonthier (CC-BY) • After the heat by Jean and Fred Hort (CC-BY-NC) • Large Cuckoo Wasp (Stilbum cyanurum) by David Cook (CC-BY-NC) • Wasp in low light by jeevan jose (CC-BY-NC-SA) • My best pose by Buddy Venturanza (CC-BY-NC-SA)
Food: Bee by Trey Ratcliff (CC-BY-NC-SA) • Abeille (me tirant la langue) sur une fleur de pissenlit by Thomas Bresson (CC-BY) • Hungry bee by Jaume Tor�n (CC-BY-NC-SA) • Metallic Green Bee_crop by mommamia (CC-BY-NC-SA) • Thread-waisted wasp with prey by Patrick Coin (CC-BY-NC-SA) • Meat Bee by Beej Jorgensen (CC-BY-NC) • Blue Flower Wasp by Louise Docker (CC-BY) • Apple eaten by wasps by metal213 (CC-BY)
Nest: oh, hi! by Rob Cruickshank (CC-BY) • Bees Nest by Steve Harris (CC-BY-NC) • Apis mellifera by Ernie (Public domain) • Hylaeus emerging by Rob Cruickshank (CC-BY) • Save the Habitat! by Karunakar Rayker (CC-BY) • Paper Wasp (Polistes major) by Bob Peterson (CC-BY-SA) • 10 wasp nest by Sharon Brogan (CC-BY-NC-SA) • Zeta argillaceum's nest construction process by Alex Popovkin (CC-BY)
Flies: Thick-Headed Fly? by Bob Peterson (CC-BY-SA) • Sicus ferrugineus by Christophe Quintin (CC-BY-NC) • Spot eyes by Jean and Fred Hort (CC-BY-NC) • Marmalade Hoverfly by Goutam Gujjar (CC-BY-NC-SA) • Florida Bee Killer (Mallophora bomboides) by Bob Peterson (CC-BY-SA) • Hoverfly by Dendroica cerulea (CC-BY)