Ground-nesting
Guides
Colletes hyalinus
polyester bee, plasterer bee, cellophane bee
Colletes hyalinus is a solitary ground-nesting bee in the family Colletidae, native to North America. The species belongs to a group commonly known as polyester bees or plasterer bees, named for the distinctive cellophane-like lining females create in their underground brood cells using secretions from the Dufour's gland. Three subspecies are recognized: C. h. hyalinus, C. h. gaudialis, and C. h. oregonensis. Like other members of the genus, this species exhibits protandry, with males emerging before females.
Colletes hyalinus gaudialis
polyester bee, plasterer bee, cellophane bee
Colletes hyalinus gaudialis is a subspecies of polyester bee in the family Colletidae. Like other members of its genus, females construct solitary underground nests lined with a cellophane-like secretion from the Dufour's gland. This waterproof coating protects the semi-liquid pollen and nectar provisions for developing larvae. The subspecies is found in North America and shares the general biology of other Colletes species.
Colletes inaequalis
Unequal Cellophane Bee, Plasterer Bee, Polyester Bee
Colletes inaequalis is a univoltine, ground-nesting solitary bee and one of the earliest pollinators to emerge in North American spring. Males emerge approximately two weeks before females and patrol nesting sites seeking mates. Females construct individual underground burrows in sandy soils, lining brood cells with a polyester secretion from abdominal glands that creates a waterproof, cellophane-like coating. The species exhibits strong site fidelity, with offspring often nesting near parental aggregation sites. It is polylectic, visiting early spring flowering trees including Eastern Redbud, maple, willow, and apple.
Colletes kincaidii
Kincaid's Cellophane Bee, Kincaid's Polyester Bee
Colletes kincaidii, known as Kincaid's cellophane bee, is a solitary ground-nesting bee in the family Colletidae. Like other Colletes species, females construct individual burrows and line brood cells with a cellophane-like secretion from the Dufour's gland, creating waterproof chambers for larval development. The species has been documented as a host for the cleptoparasitic bee Epeolus compactus, which exploits its nests. It is found in North America, with confirmed records from Vermont.
Colletes lutzi
polyester bee, plasterer bee
Colletes lutzi is a solitary ground-nesting bee in the family Colletidae, commonly known as a polyester bee or plasterer bee. Like other members of its genus, females construct individual burrows in sandy soils and line brood cells with a unique cellophane-like secretion from the Dufour's gland. This species occurs in North America, though specific details about its biology remain poorly documented compared to better-studied congeners such as C. inaequalis and C. thoracicus.
Colletes ochraceus
Ochraceous Cellophane Bee, Ochraceous Plasterer Bee
Colletes ochraceus is a solitary ground-nesting bee in the family Colletidae, commonly known as the ochraceous cellophane bee or ochraceous plasterer bee. Native to North America, this species exhibits the characteristic cellophane bee behavior of lining underground brood cells with a waterproof, cellophane-like secretion from the Dufour's gland. Females construct individual burrows in sandy soils, provisioning them with a semi-liquid mixture of pollen and nectar for their larvae. The species is part of a diverse genus of early spring-emerging bees that serve as important native pollinators.
Colletes phaceliae
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.
Colletes punctipennis
Dot-winged Cellophane Bee, Dot-winged Plasterer Bee
A solitary ground-nesting bee in the genus Colletes, known for its distinctive wing markings and cellophane-like nest linings. Like other plasterer bees, females construct individual burrows in sandy soils and coat brood cells with a waterproof secretion from the Dufour's gland. The specific epithet 'punctipennis' refers to punctate (dotted) wing markings that aid in identification.
Colletes simulans
spine-shouldered cellophane bee
Colletes simulans, commonly known as the spine-shouldered cellophane bee, is a solitary bee species in the family Colletidae. It is found in North America and shares the characteristic behaviors of its genus: nesting in underground burrows lined with a cellophane-like secretion and provisioning cells with pollen and nectar for larval development. As with other Colletes species, it is among the early spring-emerging native pollinators.
Colletes solidaginis
Goldenrod Cellophane Bee
Colletes solidaginis, known as the goldenrod cellophane bee, is a solitary ground-nesting bee in the family Colletidae. Like other members of its genus, it constructs subterranean burrows lined with a waterproof, cellophane-like secretion from abdominal glands. The species is found in North America and is associated with goldenrod (Solidago) flowers, as suggested by its specific epithet.
Colletes susannae
Susanna's Cellophane Bee
Colletes susannae, known as Susanna's cellophane bee, is a solitary ground-nesting bee in the family Colletidae. Like other members of its genus, females construct burrows in sandy soil and line brood cells with a cellophane-like secretion from the Dufour's gland. The species is found in North America and belongs to a group commonly called plasterer bees or polyester bees due to their distinctive nest-lining behavior.
Colletes validus
Blueberry Cellophane Bee
Colletes validus is a solitary, ground-nesting bee in the family Colletidae, commonly known as the blueberry cellophane bee. It is a specialist pollinator of ericaceous plants, particularly in early spring when Vaccinium species bloom. The species exhibits gregarious nesting behavior in sandy soils and is notable for its distinctive elongated, triangular facial structure.
Colletidae
plasterer bees, polyester bees, cellophane bees
Colletidae is a family of solitary bees comprising over 2,000 species across 54 genera and five subfamilies. Members are commonly called plasterer bees or polyester bees due to their distinctive nest cell linings: females apply oral and abdominal secretions that dry into a cellophane-like, waterproof polyester membrane. The family exhibits exceptional diversity in Australia and South America, with over 50% of Australian bee species belonging to this family. Two subfamilies, Euryglossinae and Hylaeinae, uniquely lack external pollen-carrying structures (scopa) and instead transport pollen internally in their crops, feeding larvae with liquid or semiliquid pollen masses. Most species are solitary ground-nesters, though many form dense aggregations, and some exhibit crepuscular activity with enlarged ocelli.
Diadasia
cactus bees, bindweed turret bees
Diadasia is a genus of solitary bees in the family Apidae, tribe Emphorini, containing approximately 42 species. These bees are oligolectic pollen specialists that primarily forage on plants in the family Malvaceae, though some species have evolved associations with other plant groups including cacti, bindweeds, and willowherbs. They are ground-nesting bees, with many species constructing distinctive turrets or chimney-like structures at their nest entrances. Male Diadasia form large mating aggregations where they compete intensely for access to emerging females.
Diadasia australis
Cactus chimney bees
Diadasia australis is a species of chimney bee in the family Apidae, found in Central America and North America. The species belongs to a genus commonly known as chimney bees or turret bees, characterized by their distinctive nest architecture. Three subspecies are recognized: D. a. australis, D. a. californica, and D. a. knabiana. The species is part of a group of solitary bees that construct above-ground turret structures at their nest entrances.
Diadasia bituberculata
Bindweed Turret Bee, Bindweed Bee, Digger Bee, Chimney Bee
Diadasia bituberculata is a solitary ground-nesting bee in the family Apidae, commonly known as the bindweed turret bee. It is native to the western coast of North America, with its range extending from Oregon through California to Baja California, Mexico. The species is an obligate specialist pollinator of bindweed (morning glory), foraging almost exclusively on plants in the genus Convolvulus. Females construct distinctive soil turrets at nest entrances in flat, bare ground, provisioning underground cells with pollen for their offspring.
Diadasia enavata
Sunflower Chimney Bee
Diadasia enavata, commonly known as the sunflower chimney bee, is a solitary ground-nesting bee in the family Apidae. It is a specialist pollinator restricted to plants in the Asteraceae family, and has been documented pollinating Coreopsis tinctoria. The species occurs across Central America and North America. Like other Diadasia species, it constructs burrows in soil, often with distinctive turret-like structures at the entrance.
Diadasia laticauda
Diadasia laticauda is a solitary bee species in the family Apidae, described by Cockerell in 1905. It belongs to the genus Diadasia, which comprises ground-nesting bees commonly known as cactus bees due to their specialized association with cactus pollen. Like other members of its genus, D. laticauda is likely a pollen specialist, though specific host plant associations for this species remain poorly documented. The species is native to North America.
Diadasia nigrifrons
Black-fronted turret bee
Diadasia nigrifrons is a species of solitary bee in the family Apidae, commonly known as the black-fronted turret bee. Like other members of the genus Diadasia, it is a ground-nesting bee that constructs distinctive turrets at its nest entrance. The species is native to North America and is part of a diverse genus of bees that specialize on particular host plants for pollen collection.
Diadasia rinconis
Cactus Bee
Diadasia rinconis is a solitary ground-nesting bee in the family Apidae, commonly known as the cactus bee. In the Sonoran Desert, it feeds almost exclusively on native cactus species, with its life cycle closely tied to cactus flowering phenology. Males form large mating aggregations where hundreds or thousands patrol nesting areas and compete in "mating balls" for access to emerging females. The species exhibits pronounced sexual dimorphism, with females possessing specialized pollen-collecting structures and males showing elongated hind legs.
Didineis
Didineis is a genus of solitary predatory wasps in the family Crabronidae, subfamily Bembicinae, with approximately 24 described species worldwide. The genus is placed in the tribe Alyssontini. Species are small, ground-nesting wasps that prey on Auchenorrhynchan Hemipterans, primarily leafhoppers (Cicadellidae) and planthoppers (Fulgoridae). Two species occur in France—D. crassicornis and D. lunicornis—where they have been documented as recurrent inhabitants of agricultural ecosystems despite historical perceptions of rarity.
Didineis peculiaris
Didineis peculiaris is a solitary wasp species in the family Crabronidae (subfamily Bembicinae, tribe Alyssontini). It was described by W. Fox in 1894. The species occurs in Central America and North America. Members of the genus Didineis are part of the sand wasp group, which typically nest in soil and provision their young with prey.
Dieunomia nevadensis arizonensis
Arizona Nomia
Dieunomia nevadensis arizonensis, known as the Arizona Nomia, is a subspecies of sweat bee in the family Halictidae. It is a ground-nesting bee distributed across the southwestern United States and adjacent regions of Mexico. The subspecies was first described by Cockerell in 1899 and is distinguished from the nominate subspecies by geographic range and subtle morphological differences. Like other members of the genus Dieunomia, it is a specialist pollinator associated with particular host plants.
Dieunomia triangulifera
Dieunomia triangulifera is a solitary sweat bee (Halictidae) specialized on sunflower pollen. It occurs in the central United States, where it forms large nesting aggregations of up to 150,000 nests. The species exhibits tight phenological synchrony with its host plant Helianthus annuus, emerging and provisioning nests to coincide with peak pollen availability. Males engage in attempted forced matings at emergence, while actual courtship occurs later.
Emphorini
Chimney Bees
Emphorini is a tribe of solitary, ground-nesting bees within the family Apidae. Members are characterized by narrow pollen preferences, with many species exhibiting oligolecty (specialized pollen collection from a restricted range of plant taxa). Nesting behavior varies: some species carry water to soften hard soil during excavation, while others do not. The tribe includes approximately nine genera distributed primarily in the New World, with an amphitropical distribution pattern in some genera.
Entomognathus
Entomognathus is a genus of solitary wasps in the family Crabronidae. The genus contains at least 40 species distributed across multiple zoogeographic regions including the Palearctic, Nearctic, Ethiopian, Oriental, and Neotropical realms. Nesting behavior has been documented for relatively few species, with E. brevis being the most thoroughly studied. The genus was historically placed in Sphecidae but is currently classified within Crabronidae.
Episyron
Episyron is a genus of spider wasps in the family Pompilidae. Members are medium to large-sized wasps that construct ground nests in sandy substrates and provision them with paralyzed spiders. Nine species occur in Europe, with additional species documented in North America including the northeastern United States.
Epomidiopteron
Epomidiopteron is a genus of solitary wasps in the family Tiphiidae, established by Romand in 1835. Members of this genus are parasitoid wasps, with females laying eggs on or near scarab beetle larvae that serve as hosts for their developing young. The genus is relatively poorly documented compared to other tiphiid genera, with limited species-level taxonomic revision in recent decades.
Eucera frater lata
A subspecies of long-horned bee in the genus Eucera, native to North America. Males possess notably elongated antennae, a defining trait of the genus. Like other Eucera species, this subspecies is a solitary ground-nesting bee and likely contributes to pollination of flowering plants in its range. Specific biological details for this subspecies remain poorly documented in published literature.
Eucera fulvitarsis
Long-horned Bee
Eucera fulvitarsis is a species of long-horned bee in the family Apidae, native to North America. Males are distinguished by exceptionally long antennae relative to body size, a characteristic feature of the genus Eucera. The species was originally described as Melissodes fulvitarsis by Cresson in 1878 and later transferred to the genus Eucera. Two subspecies are recognized: E. f. annae and the nominate E. f. fulvitarsis. Like other members of the tribe Eucerini, this species is solitary and nests in the ground.
Eucera rosae
Eucera rosae is a species of long-horned bee in the family Apidae, described by Robertson in 1900. It is found in North America. Like other members of the genus Eucera, it is a solitary ground-nesting bee. The specific epithet 'rosae' suggests an association with roses, though this relationship requires confirmation from primary sources.
Eucerini
Longhorn Bees, Long-horned Bees
Eucerini is the most diverse tribe in the family Apidae, comprising over 32 genera and approximately 500 species worldwide. All species are solitary, with females nesting in the ground and males forming characteristic overnight sleeping aggregations on vegetation. The tribe is distinguished by unusually long male antennae, the source of its common name. Eucerini reaches its highest diversity in the Western Hemisphere, with notable specialist pollinators of cucurbits including the economically important squash bees (Peponapis and Xenoglossa).
Euodynerus annulatus
mason wasp
Euodynerus annulatus is a solitary mason wasp in the subfamily Eumeninae, notable for its unusual nesting behavior among its relatives. Unlike most mason wasps that use pre-existing cavities, females excavate their own burrows in soil and construct distinctive curved mud chimneys aboveground. The species is widespread across North America with five recognized subspecies showing considerable variation in coloration and markings. It provisions nests with paralyzed caterpillars from several moth families for its larval offspring.
Exomalopsis analis
Exomalopsis analis is a small bee in the family Apidae, tribe Exomalopsini. It occurs from the southern United States through Central America to Argentina. Like other Exomalopsis species, it is a solitary ground-nesting bee. The species has been documented visiting flowers of various plants, including agricultural crops.
Gaesischia exul
Exiled Longhorn
Gaesischia exul is a species of longhorn bee in the family Apidae, tribe Eucerini. Described in 1955 by Michener, LaBerge and Moure, this bee is known by the common name 'Exiled Longhorn'. As a member of the Eucerini, it belongs to a group of solitary, ground-nesting bees that are important pollinators. The specific epithet 'exul' (Latin for 'exile' or 'wanderer') likely refers to some aspect of its distribution or behavior, though the original etymology is not documented in available sources.
Gorytes
sand wasps
Gorytes is a genus of sand wasps in the family Crabronidae, comprising at least 70 described species distributed across the Holarctic region. These solitary wasps are ground-nesting predators that provision their burrows with paralyzed prey, primarily leafhoppers (Cicadellidae), for their developing larvae. The genus is taxonomically placed within the subtribe Gorytina of the tribe Bembicini.
Gorytes willcoxi
Gorytes willcoxi is a species of sand wasp in the family Crabronidae (formerly placed in Bembicidae), described by Ohl in 2009. The species is known from North America. Like other members of the genus Gorytes, it is a solitary wasp that excavates burrows in sandy soils.
Habropoda cineraria
Habropoda cineraria is a solitary digger bee in the family Apidae, native to western North America. Like other members of the genus Habropoda, it nests in sandy soils and exhibits specialized ecological relationships with nest parasites. The species has been documented in coastal and interior western habitats, though detailed biological studies specific to this species remain limited compared to better-known congeners such as H. miserabilis and H. pallida.
Habropoda laboriosa
Southeastern Blueberry Bee, Blueberry Digger Bee
Habropoda laboriosa is a solitary ground-nesting bee in the family Apidae, native to the eastern United States. It is an oligolectic specialist pollinator of blueberries (Vaccinium spp.), for which it is the most efficient known pollinator due to its buzz pollination behavior. The species is active for only 3-5 weeks annually, synchronized with early spring blueberry bloom. It nests in aggregations in sandy soils and has been estimated to provide $20 per individual in blueberry pollination services.
Habropoda miserabilis
silver digger bee
Habropoda miserabilis, commonly known as the silver digger bee, is a solitary ground-nesting bee native to western North America. This species was historically abundant in coastal sand dune habitats but declined dramatically by the mid-20th century due to habitat loss from invasive plant encroachment. Recent habitat restoration efforts have enabled population recoveries at several sites. The species serves as a host for the parasitic blister beetle Meloe franciscanus, which has evolved sophisticated chemical mimicry to exploit the bee's mating system.
Habropoda pallida
pallid habropoda, white-faced bee
Habropoda pallida is a solitary ground-nesting bee in the family Apidae. It is the first native bee to emerge in spring on the Kelso Dunes in the Mojave National Preserve. The species has been extensively studied for its chemical communication system, which involves long-chain hydrocarbon sex pheromones. It serves as a host for the parasitic blister beetle Meloe franciscanus, whose larvae mimic the bee's pheromone signals to gain entry to nests. Females provision nests with pollen, with documented use of Larrea tridentata pollen.
Halictidae
sweat bees, halictid bees
Halictidae is the second-largest family of bees with nearly 4,500 described species worldwide. Commonly called sweat bees, many species are attracted to human perspiration to obtain dissolved salts and electrolytes. The family exhibits remarkable diversity in social organization, ranging from solitary to primitively eusocial species, and includes the taxon for which the term "eusocial" was originally coined. Halictids are important pollinators of wildflowers and some agricultural crops.
Halictinae
Sweat bees, Furrow bees
The Halictinae represent the largest and most diverse subfamily of Halictidae, comprising over 2,400 species across five tribes: Augochlorini, Thrinchostomini, Caenohalictini, Sphecodini, and Halictini. These small bees are characterized by extraordinary social diversity, ranging from solitary nesting to obligate eusociality, with eusociality having evolved approximately 20-22 million years ago. The subfamily serves as a key model system for studying social evolution due to its recent origins of eusociality and extensive behavioral polymorphisms within and between species.
Halictus
Furrow Bees, Sweat Bees
Halictus is a large genus of sweat bees in the family Halictidae, containing over 200 species divided among 15 subgenera. The genus is primarily distributed in the Northern Hemisphere, with most species exhibiting black or dark brown coloration, often with apical whitish abdominal bands. Many species are eusocial, forming colonies ranging from small groups of 2-4 individuals to over 200 bees, though social organization varies with environmental conditions. Nests are excavated in soil, with females constructing ovoid brood cells provisioned with pollen and nectar.
Halictus confusus arapahonum
Arapaho Metallic-Furrow bee
Halictus confusus arapahonum is a subspecies of sweat bee in the family Halictidae, described by Cockerell in 1906. As a member of the genus Halictus, it is likely a primitively eusocial or solitary ground-nesting bee. The nominate species Halictus confusus is known as the Confusing Furrow Bee or Metallic-Furrow bee. This subspecies is distinguished by geographic range and subtle morphological differences from other populations of H. confusus. Like other halictids, adults are generalist pollinators that visit diverse flowering plants.
Halictus farinosus
Wide-striped Sweat Bee
Halictus farinosus is a primitively eusocial sweat bee native to North America. It nests underground in soil, forming small colonies averaging 3.5 workers and 13.5 reproductive brood. The species exhibits intermediate social strength within the genus Halictus, with most workers mated and capable of ovarian development. Nesting phenology varies with annual weather conditions, with colder, wetter springs delaying activity by up to two weeks.
Halictus ligatus
Ligated Furrow Bee, sweat bee
Halictus ligatus is a primitively eusocial sweat bee native to North and Central America. It nests in ground burrows or rotting wood, forming colonies with reproductive division of labor between queens and workers. The species exhibits remarkable behavioral plasticity: northern populations have annual colony cycles with distinct worker and reproductive broods, while subtropical populations show continuous brooding and reduced social hierarchy. Queens establish dominance through aggression and pheromonal suppression of worker reproduction. The species is polylectic, collecting pollen from diverse flowering plants, and serves as an important native pollinator.
Halictus rubicundus
Orange-legged Furrow Bee
Halictus rubicundus, the orange-legged furrow bee, is a ground-nesting sweat bee with one of the widest natural distributions of any bee species, occurring throughout temperate regions of the Holarctic. The species is notable for its socially polymorphic behavior: populations are eusocial in warmer, lower-elevation regions with longer growing seasons, producing multiple broods with worker offspring, while populations at higher latitudes or elevations are solitary, producing only a single brood. This environmental plasticity in social organization has made the species a key model for studying the evolution of social behavior. Females excavate burrows in soil, typically on south-facing slopes to maximize thermal conditions for larval development.
Halictus tripartitus
Tripartite Sweat Bee
Halictus tripartitus is a medium-sized sweat bee in the family Halictidae, native to North America. The species exhibits partial eusociality, with nests connected underground and some workers retaining reproductive capability. It is a documented pollinator of Silene spaldingii and other flowering plants. The species has been observed foraging on sunflowers and coneflowers alongside other native bees.
Harpactus
Snatching Sand Wasps
Harpactus is a genus of solitary hunting wasps in the family Crabronidae, commonly known as Snatching Sand Wasps. These wasps are part of the tribe Bembicini (or Gorytini in some classifications) and are known for their ground-nesting behavior and predatory habits. The genus was established by Shuckard in 1837 and includes multiple described species.