Bicolored Striped Sweat Bee, bicolored striped-sweat bee
Agapostemon virescens, commonly known as the bicolored striped sweat bee, is a metallic green halictid bee native to North America. It is the official bee of Toronto, Canada. Females nest underground, often forming aggregations where multiple females share a single burrow entrance, though the species is considered solitary rather than truly social. The species exhibits sexual dimorphism in coloration and is a generalist pollinator frequently observed on flowers.
Apiform Morning glory-Digger
Ancyloscelis apiformis is a solitary bee in the family Apidae, tribe Emphorini. It is known for its association with morning glory flowers (Ipomoea species), from which it derives its common name. The species has a broad distribution across the Americas, from the southern United States through Central America and into South America. As a member of the subfamily Apinae, it exhibits pollen-collecting behavior typical of this group.
Canada miner bee, Canada andrena, Canadian Mining Bee
Andrena canadensis is a solitary mining bee in the family Andrenidae, native to North America. Like other Andrena species, it nests in the ground and is active in spring. The species is poorly documented in scientific literature, with most information inferred from genus-level traits.
Forbes' Mining Bee, Forbes's Miner Bee, Forbes' Andrena
Andrena forbesii is a solitary mining bee in the family Andrenidae, native to North America. Like other members of its genus, it nests in underground burrows excavated in soil. The species was described by Robertson in 1891. Available information on this species is limited compared to better-studied Andrena species.
Cherry Mining Bee, cherry miner
Andrena pruni is a solitary mining bee in the family Andrenidae, native to North America. It is commonly known as the Cherry Mining Bee or cherry miner. Like other members of the genus Andrena, it nests in the ground and is an important pollinator. The specific epithet 'pruni' suggests a likely association with Prunus (cherry/plum) species as a pollen or nectar source, though this relationship requires confirmation.
Northern Rotund-Resin Bee
Anthidiellum notatum, commonly known as the northern rotund-resin bee, is a solitary bee in the family Megachilidae. It is distributed across North America, with five recognized subspecies showing regional variation. As a member of the tribe Anthidiini, it belongs to a group commonly called resin bees for their use of plant resins in nest construction.
Anthidiellum robertsoni is a species of bee in the family Megachilidae, order Hymenoptera. It is a member of the tribe Anthidiini, commonly known as wool-carder bees or potter bees. The species was described by Cockerell in 1904. Like other members of its genus, it is likely a solitary bee that constructs nests using plant materials. The species occurs in North America.
Edwards' Woolcarder
Anthidium edwardsii is a solitary bee in the family Megachilidae, commonly known as the wool carder bees. The species was described by Cresson in 1878 and occurs in North America. Like other Anthidium species, females collect plant fibers from hairy leaves to construct nest cells. The species has undergone several taxonomic revisions, with three junior synonyms synonymized under the current name.
Emarginated Carder Bee
Anthidium emarginatum is a species of solitary bee in the family Megachilidae, commonly known as the Emarginated Carder Bee. First described by Thomas Say in 1824, this species belongs to the genus Anthidium, which includes bees known for collecting plant fibers (carding) to line their nest cells. The species is native to North America.
oblong woolcarder bee
Anthidium oblongatum is a solitary bee in the family Megachilidae, commonly known as the oblong woolcarder bee. Native to Eurasia and North Africa, it has been introduced to North America and South America, with a first record in central Chile documented in 2025. Females construct nests using plant fibers collected from leaves, earning the 'woolcarder' common name. The species shows strong floral specialization, primarily foraging on Fabaceae, Crassulaceae, and Resedaceae.
Anthophora crotchii is a species of digger bee in the family Apidae, first described by Ezra Townsend Cresson in 1879 and named after entomologist George Robert Crotch. It belongs to the genus Anthophora, a group of solitary, ground-nesting bees commonly known as digger bees. The species occurs in North America. Like other members of its genus, it is expected to be a solitary bee that excavates nests in soil, though specific biological details remain poorly documented in published literature.
Walsh's anthophora
Anthophora walshii is a species of anthophorine bee in the family Apidae. It is found in North America. Males and females exhibit sexual dimorphism in size, with males generally larger than females. Males can reach up to 16 mm in length with an abdomen breadth of 6 mm, while females grow to approximately 14 mm in length with an abdomen breadth of 5 mm. The species is part of the diverse Anthophora genus, which includes many digger bee species.
Anthophorula micheneri is a small bee species in the family Apidae, tribe Exomalopsini. Originally described as Exomalopsis micheneri in 1947, this species was historically known from limited geographic records. Recent collections from Virginia, USA documented a substantial range extension of approximately 1,350 km northeastward from its previously known distribution. It has been recorded visiting flowers in the family Apiaceae and the genus Agalinis.
Shining Mini-Digger
Anthophorula nitens is a small bee species in the family Apidae, tribe Exomalopsini, commonly known as the Shining Mini-Digger. It was first described by Cockerell in 1915 under the basionym Exomalopsis nitens. The species is native to North America and belongs to a genus of solitary bees that are typically associated with ground-nesting habits. Like other members of Exomalopsini, it likely exhibits specialized pollen-collecting structures and solitary reproductive behavior.
Ashmeadiella bigeloviae is a species of solitary bee in the family Megachilidae. It was first described by Cockerell in 1897 under the name Heriades bigeloviae. The species occurs in Central America and North America. Like other members of its genus, it is a cavity-nesting bee that carries pollen on the underside of its abdomen.
Western Big-Cheeked Angled-Mason
Ashmeadiella bucconis denticulata is a subspecies of mason bee in the family Megachilidae. It is one of several subspecies within the Ashmeadiella bucconis species complex. The subspecies was originally described by Cresson in 1878 under the genus Heriades. Very few observations exist in citizen science databases, suggesting it may be uncommon or underreported.
Square-jawed Angled-Mason
Ashmeadiella xenomastax is a species of mason bee in the family Megachilidae, first described by Michener in 1939. It is known from Central and North America. The common name "Square-jawed Angled-Mason" refers to distinctive morphological features of the species. Like other members of the genus Ashmeadiella, it is a solitary bee that constructs nests using collected materials.
Atoposmia is a genus of bees in the family Megachilidae, tribe Osmiini. The genus was established by Cockerell in 1935 and is part of the diverse megachilid bee fauna. These bees are solitary and nest in pre-existing cavities, with females constructing brood cells using collected materials.
Augochlora pura mosieri is a subspecies of the solitary sweat bee Augochlora pura, described by Cockerell in 1922. As a member of the Halictidae family, it exhibits the metallic green coloration typical of the Augochlorini tribe. Like other Augochlora pura populations, it is solitary, nesting in rotting wood galleries rather than soil. The subspecies designation indicates geographic variation within the broader species range in eastern North America.
Augochlorella nigrocyanea is a species of sweat bee in the family Halictidae, tribe Augochlorini. The genus Augochlorella contains several species of small, metallic bees that are difficult to distinguish from related genera Augochlora and Augochloropsis without microscopic examination. Members of this genus are known for their bright metallic green, blue-green, or occasionally brassy coloration. Some Augochlorella species exhibit communal nesting or primitively social behavior, with multiple females sharing nest entrances.
sweat bee
Augochloropsis anonyma is a species of sweat bee in the family Halictidae. It belongs to the tribe Augochlorini, a group of metallic green bees that are frequently mistaken for cuckoo wasps due to their similar appearance. The species was described by Theodore Dru Alison Cockerell in 1922. Like other members of its genus, it is a solitary bee that nests in soil or rotting wood.
Metallic epauletted-sweat bee
Augochloropsis metallica is a brilliant green metallic sweat bee in the family Halictidae, native to Central and North America. First described by Fabricius in 1793, the species underwent significant taxonomic revision when a former subspecies (A. fulgida) was elevated to species status, resulting in the division of the original A. metallica into five distinct species. The species is commonly found in the Midwest, Northeast, and Southern United States.
Brachymelecta is a genus of cuckoo bees in the family Apidae, established by Linsley in 1939. The genus was formerly known as Xeromelecta until 2021. These bees are cleptoparasites, meaning they lay eggs in the nests of other bees and rely on host provisions to rear their young. The genus includes six recognized species distributed primarily in North America and the Caribbean.
Eastern Miner Bee
Calliopsis andreniformis, commonly known as the eastern miner bee, is a solitary ground-nesting bee in the family Andrenidae. It is native to North America and has been documented as a specialist pollinator of plants in the family Fabaceae. The species belongs to a genus of small mining bees that typically nest in sandy or bare soils. Like other members of Andrenidae, females construct individual burrows and provision cells with pollen and nectar for their offspring.
Strange-winged Calliopsis
Calliopsis anomoptera is a small mining bee in the family Andrenidae, described by Michener in 1942. The common name 'Strange-winged Calliopsis' refers to distinctive wing characteristics. Like other members of the genus Calliopsis, it is a ground-nesting solitary bee. The species occurs in both Central America and North America.
Calliopsis barbata is a small mining bee in the family Andrenidae, first described by Timberlake in 1952. As a member of the genus Calliopsis, it belongs to a group of solitary, ground-nesting bees commonly found in open, sandy habitats. The species occurs in Central America and North America, though specific details about its biology remain poorly documented in published literature.
Colorado Calliopsis Bee
A small mining bee in the family Andrenidae, native to western North America. Females are solitary ground-nesters that provision burrows with pollen and nectar for their offspring. Males are often observed flying low over nesting aggregations in search of mates. The species is associated with sandy soils in prairie and open habitats.
Calliopsis filiorum is a species of mining bee in the family Andrenidae, described by Rozen in 1963. The species belongs to the genus Calliopsis, a group of small to medium-sized ground-nesting bees. Like other members of Andrenidae, females construct solitary burrows in soil. The specific epithet "filiorum" (Latin for "of the daughters") presumably references an aspect of the species' biology or discovery context.
Calliopsis helianthi is a species of mining bee in the family Andrenidae. It is native to Central America and North America. Like other members of the genus Calliopsis, this species nests in the ground and is solitary, with each female constructing and provisioning her own nest burrow.
Calliopsis obscurella is a small mining bee species in the family Andrenidae, first described by Cresson in 1879. It occurs in Central America and North America. Like other members of its genus, it is a solitary ground-nesting bee. Specific details about its biology and ecology remain poorly documented.
Calliopsis rhodophila is a mining bee in the family Andrenidae, described by Cockerell in 1897. The species occurs in Central and North America, where it nests in sandy soils. Like other members of the genus, it is solitary and ground-nesting. Observations of related Calliopsis species suggest males are notably larger than typical for the genus and exhibit hovering flight behavior near female nesting sites.
Calliopsis scutellaris is a species of mining bee in the family Andrenidae, described by Fowler in 1899. The species occurs in Central America and North America. It belongs to a genus of small to very small bees that typically nest in sandy soils.
A subspecies of mining bee in the family Andrenidae, known from sandy soils in Colorado and adjacent regions. Males are notably larger than typical for the genus Calliopsis and exhibit distinctive flight behavior, hovering persistently over nesting sites. The subspecies was described by Rozen in 1958 and is part of the diverse native bee fauna of western North America.
ocellate fork-tongue
Caupolicana ocellata is a species of bee in the family Colletidae, commonly known as the ocellate fork-tongue. It was described by Michener in 1966. The species belongs to a genus of neotropical bees characterized by forked tongues, an adaptation for accessing nectar from specialized flowers. It occurs in Central America and North America, though specific details about its biology remain limited in published literature.
Cockerell's Oil-Digger
Centris cockerelli is a species of oil-collecting bee in the family Apidae, described by Fox in 1899. As a member of the tribe Centridini, it is one of the bees specialized in collecting floral oils rather than nectar. The species occurs in Central America and North America, though specific details about its biology remain poorly documented in scientific literature.
Wandering Centris, Florida locust-berry oil-collecting bee, spiny bear's-breech
Centris errans is a species of oil-collecting bee in the tribe Centridini, family Apidae. It is endemic to Florida, where it is one of five Apidae species restricted to the state. The species occurs in the southernmost portion of Florida and has also been recorded in the broader Caribbean and North America regions. Like other Centris bees, it is known to collect floral oils rather than nectar from certain host plants.
Shining Oil-digger Bee
Centris nitida is a centridine bee in the family Apidae, commonly known as the Shining Oil-digger Bee. The species is native to Central America and has been introduced to Florida in the United States. It belongs to a genus specialized in collecting floral oils rather than nectar, using these oils to provision nests and feed larvae. Two subspecies are recognized: Centris nitida nitida and Centris nitida geminata.
small carpenter bee
Ceratina acantha is a species of small carpenter bee in the family Apidae, native to Central and North America. It is one of numerous Ceratina species that contribute to wild bee pollination services, though like most small carpenter bees, it is not among the dominant crop-pollinating species. These bees are solitary or weakly social and nest in pre-existing cavities in dead plant material. The species has been documented in studies examining pollinator responses to flower density, showing flexible foraging patterns compared to larger social bees.
Cobalt Small Carpenter, cobalt ceratina
Ceratina cobaltina is a species of small carpenter bee in the family Apidae, first described by Cresson in 1878. It is native to Central America and belongs to the genus Ceratina, which comprises small, often metallic bees that nest in pithy or hollow plant stems. Like other members of its genus, it is a solitary bee that contributes to pollination services in its native range.
Cockerell's ceratina
Ceratina cockerelli is a small carpenter bee in the family Apidae, described by H. S. Smith in 1907. Like other members of the genus Ceratina, it is a solitary bee that nests in preexisting cavities such as hollow plant stems. The species occurs in the Caribbean and North America, where it contributes to wild bee diversity and pollination services. It is one of many Ceratina species that collectively represent important pollinators in various ecosystems.
Florida Small Carpenter Bee
Ceratina floridana is a small carpenter bee endemic to Florida, described by Mitchell in 1962. As a member of the genus Ceratina, it belongs to a group of diminutive bees that nest in dead twigs and stems rather than excavating wood like their larger carpenter bee relatives (Xylocopa). The species has been documented through 226 iNaturalist observations, indicating moderate levels of contemporary detection. Like other Ceratina species, it likely exhibits solitary or weakly social nesting behavior, though specific behavioral details for this species remain poorly documented in published literature.
small carpenter bee
Ceratina mikmaqi is a small carpenter bee native to eastern North America, described in 2011. It belongs to a genus of solitary bees that nest in the pith of dead twigs. In southern Ontario, it has been documented as locally common, where it constructs linear nests primarily in Fuller's teasel (Dipsacus fullonum). The species is genetically distinct from its congener C. dupla, with which it was previously confused, separated by five fixed nucleotide differences and approximately 1.86% sequence divergence in DNA barcode analysis.
Tiny Small carpenter, dwarf ceratina
Ceratina nanula is a species of small carpenter bee in the family Apidae, described by Cockerell in 1897. It is one of the smallest members of the genus Ceratina, commonly known as the "dwarf ceratina" or "tiny small carpenter." The species has been documented in Central America and North America. Like other Ceratina species, it is a solitary bee that nests in pithy or hollow plant stems.
nimble ceratina, nimble small carpenter bee
Ceratina strenua, commonly known as the nimble ceratina, is a species of small carpenter bee in the family Apidae. It is native to North America, with confirmed records from Vermont and other regions. As a member of the genus Ceratina, it belongs to a group of small, solitary bees that nest in hollow plant stems or other pre-existing cavities. The species has been documented as a pollinator of multiple flowering plants, including Penstemon digitalis, Monarda fistulosa, and Eryngium yuccifolium, and exhibits flexible foraging preferences that vary depending on flower identity and competitive context.
Mock-orange Scissor Bee
Chelostoma philadelphi is a small solitary bee in the family Megachilidae, commonly known as the Mock-orange Scissor Bee. The species is native to North America and has been documented in the northeastern United States, including Vermont. Its morphology and nesting biology have been formally described, though detailed ecological data remain limited. The species belongs to a genus of scissor bees characterized by specialized nesting habits.
Coelioxys immaculatus is a species of cuckoo bee in the family Megachilidae, first described by Cockerell in 1912. Like all members of the genus Coelioxys, this species is a cleptoparasite (cuckoo) of other bees, specifically targeting leafcutter bees (Megachile). The specific epithet 'immaculatus' suggests an unmarked or spotless appearance, though detailed morphological descriptions are limited in available sources. As a parasitic bee, females do not construct nests or collect pollen but instead lay eggs in the nests of host species.
Say's Cuckoo Leafcutter Bee
Coelioxys sayi is a species of kleptoparasitic bee in the family Megachilidae, commonly known as Say's Cuckoo Leafcutter Bee. As a member of the sharp-tailed bee genus Coelioxys, this species does not construct its own nests but instead parasitizes the nests of other solitary bees, particularly leafcutter bees (Megachile spp.). Females possess a pointed abdomen adapted for inserting eggs into host nest cells. The species occurs in North America and is active during the summer months when host species are nesting.
Coelioxys texanus is a species of cuckoo bee in the family Megachilidae, first described by Cresson in 1872. As a member of the genus Coelioxys, this species is a cleptoparasite that lays its eggs in the nests of other bees, primarily targeting leafcutter bees (Megachile species). The specific epithet "texanus" indicates a Texas association, likely reflecting the type locality or early collection records from that region. Like other Coelioxys species, females possess a pointed, conical abdomen adapted for inserting eggs into host nest cells.
phacelia cellophane bee
Colletes phaceliae is a solitary ground-nesting bee in the family Colletidae, commonly known as the phacelia cellophane bee. Like other members of the genus Colletes, females construct subterranean burrows and line brood cells with a cellophane-like secretion from the Dufour's gland, creating waterproof chambers for their larvae. The species is found in North America and is named for its association with phacelia flowers.