They have over a million described species, making up more than 80% of all described living animal species. They range in size from microscopic plankton up to forms a few meters long.
The USGS Native Bee Inventory and Monitoring Program designs and develops large and small-scale surveys and identification tools for native bees. A vital aspect of the program is to create accurate and detailed pictures of native bees as well as the plants and insects they interact with.
On their 1200+ Flickr photostream, the USGS Bee Inventory and Monitoring Lab (USGS BIML) has uploaded an astounding collection of macro photographs that you can see in full resolution. The detail and clarify is unlike anything I’ve ever seen.
Hidden Unseen went through all 1200 photos earlier today and compiled our 40 favourites. Be sure to check them out on Flickr to appreciate the volume of work they have shared for the benefit of all visitors.
1. Unknown Wasp
 2. Yellow Jacket Mimic Fly
 3. Female Northern Black Widow Spider
(Latrodectus variolus)
 4. The Endangered Karner Blue
(Lycaeides melissa samuelis)
 5. Melissodes dentiventris
 6. Beetle on glass
 7. Black Horse Fly
(Tabanus atratus)
 8. Augochlora regina
 9. Oblong-winged katydid
(Amblycorypha oblongifolia)
 10. Megachile-campanulae
 11. Lasioglossum nr longifrons
 12. Lace Bug
 13. Rove Beetle
 14. Trypoxylon mexicanum
 15. Centris haemorrhoidalis
 16. Cone Head
 17. Agapostemon coloradinus
 18. Leptochilus acolhuus
 19. Harlequin Bug Eggs
(Murgantia histrionica)
 20. Polistes metricus
 21. Spider Wasp
 22. Gryllus species
 23. Hoplitis truncata
 24. Deer Fly
(Tabanidae)
 25. Drepanaporus collaris
 26. Triepeolus donatus
 27. Drepanaporus collaris
 28. Sharpshooter
(Oncometopia orbona)
 29. Trypoxylon mexicanum
 30. Yellow Jacket Mimic Fly
 31. Pearl Crescent
(Phyciodes tharos)
 32. Camel Cricket
(Diestrammena asynamora)
 33. Harlequin Bug Nymphs
(Murgantia histrionica)
 34. Lachnopus guerinii
 35. Bombus griseocollis
 36. Coelioxys sayi
 37. Unknown Spider
 38. Brown marmorated stinkbug
(Halyomorpha halys)
 39. Osmia sandersoneae
 40. Dianthidium curvatum
 Source