Bees: In order of discovery
- Western Honey Bee - July 16
- European Wool Carder Bee - July 21
- Genus Triepeolus - July 21
- Hunt's Bumble Bee - July 22
- Half-black Bumble Bee - July 29
- Genus Melissodes - July 29
- Confusing Furrow Bee - August 12
- Subgenus Zadontomerus - August 13
- Ligated Furrow Bee - August 15
- Red-belted Bumble Bee - September 5
- Masked Bees - October 2
- Fuzzy-Horned Bumble Bee - April 21
- Great Basin Bumble Bee - April 21
- Blue Orchard Bee - April 21
- Metallic Sweat Bees - April 21
- Common Digger Bees - April 28
- Nevada Bumble Bee - June 8
- Subgenus Synhalonia - June 16
- Blood Bees - June 21
- Yellow-faced Bumble Bee - June 24
- Fernald's Cuckoo Bumble Bee - June 24
- Crotch's Nomad Bee - May 5
- Prunus Miner - May 16
- Subgenus Melanosmia - May 22
- Nearctic Bumble Bee - May 24
- Genus Panurginus - May 27
- Subgenus Trachandrena - May 27
- Subgenus Melecta - May 27
- Black-and-gray Leafcutter Bee - June 1
- White-shouldered Bumble Bee - July 11
- Los Angeles Resin Bee - July 14
- Pugnacious Leafcutter Bee - July 14
- Subgenus Neotrypetes 14 - July
- Alfalfa Leafcutter Bee 15 - July
- White-fronted Small-Mason - July 15
- Brown-belted Bumble Bee - July 24
- Subgenus Cyrtocoelioxys - July 25
- Orange-legged Furrow Bee - July 29
- Subgenus Dianthidium - September 3
- Subgenus Melandrena - April 21
- Bicolored Striped Sweat Bee - June 2
- Indiscriminate Cuckoo Bee - June 3
- Urbane Digger Bee - August 21