Bees are some of the most abundant and important pollinators in the world – especially in mountainous environments. Despite the importance of bees in our natural environments, many national parks do not know what species are in their parks. In 2016, to celebrate the Centennial of the National Park Service, North Coast and Cascades National Parks focused on pollinators. The inventories we initiated at that time are just a beginning; you can continue our quest to learn more about bees by uploading your photos to inaturalist.org.


Mining Bees (Andrenidae)

Species Common name Sociality/nesting EBLA FOVA LEWI MORA NOCA OLYM SAJH
Andrena columbiana Mining bee Solitary; belowground nest x
Andrena knuthiana Mining bee Solitary; belowground nest x
Andrena thaspii Mining bee Solitary; belowground nest x
Andrena trevoris Mining bee Solitary; belowground nest x
Andrena vicinoides Mining bee Solitary; belowground nest x
Andrena washingtoni Mining bee Solitary; belowground nest x
Andrena w-scripta Mining bee Solitary; belowground nest x
Panurginus atriceps Mining bee Solitary; belowground nest x x
Panurginus ineptus Mining bee Solitary; belowground nest x x
EBLA = Ebey’s Landing National Historical Reserve; FOVA = Fort Vancouver National Historic Site; LEWI = Lewis and Clark National Historical Park; MORA = Mount Rainier National Park; NOCA = North Cascades National Park Complex; OLYM = Olympic National Park; SAJH = San Juan Island National Historical Park.
Dorsal view of pinned bee, Andrena w-scripta
Mining bee (Andrena w-scripta). Mining bees are solitary bees that nest in the ground.

NPS / Jessica Rykken

Bumble Bees, Honey Bees, Cuckoo Bees, etc. (Apidae)

Species Common name Sociality/nesting EBLA FOVA LEWI MORA NOCA OLYM SAJH
Apis mellifera* Honey bee Social; hive x x
Bombus appositus White-shouldered bumble bee Social; belowground/surface nest x x x x x
Bombus bifarius Two form bumble bee Social; belowground nest x x x x
Bombus caliginosus Obscure bumble bee Social; above/belowground nest x x x
Bombus fervidus California bumble bee Social; aboveground/surface nest x x x
Bombus flavidus Fernald cuckoo bumble bee Social parasite x x
Bombus flavifrons Yellow-fronted bumble bee Social; belowground nest x x x x x x
Bombus griseocollis Brown-belted bumble bee Social; belowground/surface nest x
Bombus insularis Indicscriminate cuckoo bumble bee Social parasite x
Bombus melanopygus Black tail bumble bee Social; above/belowground nest x x x
Bombus mixtus Fuzzy-horned bumble bee Social; surface or above/belowground nest x x x x x
Bombus nevadensis Nevada bumble bee Social; belowground nest x
Bombus occidentalis Western bumble bee Social; belowground nest x
Bombus rufocinctus Red-belted bumble bee Social; aboveground/surface nest x x x x
Bombus sitkensis Sitka bumble bee Social; belowground nest x x x
Bombus sylvicola Forest bumble bee Social; belowground nest x x x
Bombus vandykei van Dyke bumble bee Social; belowground nest x x
Bombus vosnesenskii Vosnesensky bumble bee Social; belowground nest x x x x x
Diadasia diminuta Chimney bee Solitary/Aggregations; ground nest x
Melissodes sp. Long-horned bee Solitary; ground nest x
Nomada sp. Cuckoo bee Kleptoparasite x x
Ceratina acantha Prickly ceratina Subsocial; belowground nest x
* = non-native
EBLA = Ebey’s Landing National Historical Reserve; FOVA = Fort Vancouver National Historic Site; LEWI = Lewis and Clark National Historical Park; MORA = Mount Rainier National Park; NOCA = North Cascades National Park Complex; OLYM = Olympic National Park; SAJH = San Juan Island National Historical Park.
Head view of pinned bee, Bombus caliginosus
Obscure bumble bees (Bombus caliginosus) are restricted to the Pacific Coast and live in social colonies.

NPS / Jessica Rykken

Plasterer Bees, Polyester Bees (Colletidae)

Species Common name Sociality/nesting EBLA FOVA LEWI MORA NOCA OLYM SAJH
Colletes nigrifrons Polyester bee Solitary; belowground nest x
Colletes consors Polyester bee Solitary; belowground nest x
Hylaeus annulatus Masked bee Solitary; pithy stems x x
Hylaeus coloradensis Masked bee Solitary; pithy stems x
Hylaeus episcopalis Masked bee Solitary; pithy stems x
Hylaeus modestus Masked bee Solitary; pithy stems x x
Hylaeus nevadensis Masked bee Solitary; pithy stems x
Hylaeus wootoni Masked bee Solitary; pithy stems x x
EBLA = Ebey’s Landing National Historical Reserve; FOVA = Fort Vancouver National Historic Site; LEWI = Lewis and Clark National Historical Park; MORA = Mount Rainier National Park; NOCA = North Cascades National Park Complex; OLYM = Olympic National Park; SAJH = San Juan Island National Historical Park.
Head view of pinned bee, Hylaeus modestus
Masked bee (Hylaeus modestus), a solitary bee that nests in hollow twigs.

NPS / Jessica Rykken

Sweat Bees (Halictidae)

Species Common name Sociality/nesting EBLA FOVA LEWI MORA NOCA OLYM SAJH
Agapostemon virescens Sweat bee Solitary; belowground nest x
Halictus confusus Sweat bee Social; belowground nest x x
Halictus rubicundus Sweat bee Social; belowground nest x x
Halictus virgatellus Sweat bee Social; belowground nest x x
Lasioglossum anhypops Sweat bee Solitary; belowground nest x
Lasioglossum colatum Sweat bee Solitary; belowground nest x
Lasioglossum egregium Sweat bee Solitary; belowground nest x
Lasioglossum nigroviride Sweat bee Social; belowground nest x
Lasioglossum ruidosense Sweat bee Social; belowground nest x
Lasioglossum sisymbrii Sweat bee Solitary; belowground nest x
Lasioglossum trizonatum Sweat bee Solitary; belowground nest x
Lasioglossum zonulum* Sweat bee Solitary; belowground nest x
Sphecodes sp. Cuckoo bee Kleptoparasite x x
Dufourea campanulae Sweat bee Solitary; belowground nest x
Dufourea maura Sweat bee Solitary; belowground nest x
* = non-native
EBLA = Ebey’s Landing National Historical Reserve; FOVA = Fort Vancouver National Historic Site; LEWI = Lewis and Clark National Historical Park; MORA = Mount Rainier National Park; NOCA = North Cascades National Park Complex; OLYM = Olympic National Park; SAJH = San Juan Island National Historical Park.
Head view of pinned bee, Halictus rubicundus
Sweat bee (Halictus rubicundus). Sweat bees are usually social bees and nest in the ground. This species is native to Europe, northern Asia, and most of North America.

NPS / Jessica Rykken

Mason Bees, Leafcutter Bees (Megachilidae)

Species Common name Sociality/nesting EBLA FOVA LEWI MORA NOCA OLYM SAJH
Anthidium tenuiflorae Wool carder bee Solitary; belowground cavity lined with plant hair x
Coelioxys rufitarsis Cuckoo bee Kleptoparasite x
Coelioxys sodalis Cuckoo bee Kleptoparasite x
Hoplitis fulgida fulgida Mason bee Solitary; cavity nest x
Megachile melanophaea Leafcutter bee Solitary; belowground cavity x
Megachile perihirta Leafcutter bee Solitary; belowground cavity x x
Megachile relativa Leafcutter bee Solitary; wood cavity x x
Osmia coloradensis Mason bee Solitary; wood/stem cavity x
Osmia densa Mason bee Solitary; wood cavity x x
Osmia dolerosa Mason bee Solitary; wood cavity x x
Osmia paradisica Mason bee Solitary; ?ground cavity x
Osmia penstemonis Mason bee Solitary; stem cavity x
Osmia pusilla Mason bee Solitary; wood/stem cavity x x
Osmia simillima Mason bee Solitary; galls, wood cavity x
Osmia subaustralis Mason bee Solitary; wood cavity x
Osmia tristella Mason bee Solitary; wood/stem cavity x x
Stelis sp. Cuckoo bee Kleptoparasite x
EBLA = Ebey’s Landing National Historical Reserve; FOVA = Fort Vancouver National Historic Site; LEWI = Lewis and Clark National Historical Park; MORA = Mount Rainier National Park; NOCA = North Cascades National Park Complex; OLYM = Olympic National Park; SAJH = San Juan Island National Historical Park.
Macro view of the beautiful, iridescent head of a mason bee
Mason bee (Hoplitis fulgida). These bees are solitary, and nest in pre-existing holes and crevices.

NPS / Jessica Rykken