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  • Nesting: Oxyandrena genus exhibits ground-nesting behavior. Females create vertical or slightly inclined nests in sandy or loose soil. Nests typically have a single entrance with a series of lateral branches, each ending in a brood cell. Brood cells are provisioned with pollen and nectar for larval development.
  • Pollen Carrying Method: Abdominal Collection
  • Foraging: Oxyandrena bees are typically oligolectic, meaning they specialize in foraging from a narrow range of plant species, often within a single plant family.
  • Size: Tiny, 5-8 mm.
  • Average Length: 11 mm
  • Body Type: Andreniform
  • Coloring: Green, yellow
  • Pattern: Stripes
  • Sociality: Solitary
  • Wings: Clear, veined, membranous, functional, slender.
  • Eyes: Large, compound, and oval-shaped.
  • Mandibles: Specialized, strong, and elongated.
  • Sting: Stingless, pain: none, aggression: low
  • Tarsal Claws: Simple or bifurcate claws.
  • Abdomen: Yellow-banded, slender abdomen.
  • Antennae: Medium
  • Hair: Sparse, short, pale, fine
  • Colorado Native: false
Additional Notes: 1. Genus in the bee family Andrenidae. 2. Known for specialized pollination behaviors. 3. Found primarily in arid and semi-arid regions. 4. Key role in pollinating native desert flora. 5. Morphologically adapted for efficient pollen collection.

Identification Tips: 1. Medium-sized bees with robust body structure. 2. Predominantly black or dark brown coloration. 3. Pollen-collecting hairs (scopa) present on hind legs. 4. Forewings with two submarginal cells. 5. Distinct, often bright-colored banding on the abdomen. 6. Hairy faces, especially around the clypeus and paraocular areas. 7. Tongue of moderate length, adapted for various flowers.


  • Name: Oxyandrena
  • Rank: subgenus
  • ID: 571419

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