Select common names to view flight period histograms (1864-2015). Histograms include queens, workers, and males.

Common Name	Scientific Name	Earliest	Latest
Rusty-patched Bumble Bee	Bombus affinis	12-Jun	10-Oct
Ashton's Cuckoo Bumble Bee	Bombus ashtoni	24-May	9-Sep
Two-spotted Bumble Bee	Bombus bimaculatus	12-May	12-Oct
Northern Amber Bumble Bee	Bombus borealis	21-May	14-Oct
Lemon Cuckoo Bumble Bee	Bombus citrinus	28-Jun	6-Sep
Fernald's Cuckoo Bumble Bee	Bombus flavidus	8-Jul	6-Aug
Yellow Bumble Bee	Bombus fervidus	31-May	23-Sep
Brown-belted Bumble Bee	Bombus griseocollis	13-May	25-Sep
Common Eastern Bumble Bee	Bombus impatiens	5-May	10-Nov
Indiscriminate Cuckoo Bumble Bee	Bombus insularis	10-Aug	12-Aug
American Bumble Bee	Bombus pensylvanicus	21-Apr	12-Aug
Confusing Bumble Bee	Bombus perplexus	2-May	19-Sep
Red-belted Bumble Bee	Bombus rufocinctus	9-Jun	4-Sep
Sanderson's Bumble Bee	Bombus sandersoni	21-May	23-Sep
Tri-colored Bumble Bee	Bombus ternarius	26-Apr	21-Oct
Yellow-banded Bumble Bee	Bombus terricola	12-May	30-Sep
Half-black Bumble Bee	Bombus vagans	14-May	13-Oct
Other Target Bees
Eastern Carpenter Bee	Xylocopa virginica	2-Jul	16-Sep
Giant Resin Bee	Megachile sculpturalis
European Wool-carder Bee	Anthidium manicatum