Metallic green orchid bee

Euglossa dilemma

Quebrada Valencia Magdalena Colombia

Quick Facts

  • Scientific Name: Euglossa dilemma
  • Spanish Name: Abeja verde de las orquĂ­deas
  • Family: Apidae
  • Known Nicknames: Green orchid bee, Dilemma orchid bee
  • Average Length: 1.0–1.3 cm / 0.39–0.51 in
  • Average Weight: 0.05–0.1 g / 0.0018–0.0035 oz
  • Wingspan: 1.8–2.2 cm / 0.71–0.87 in
  • Key Feature: Brilliant iridescent metallic green exoskeleton and an extremely long tongue (proboscis)
  • Primary Diet: Nectar and pollen (Herbivore); males also collect floral fragrances
  • Range: Central America (Mexico to Costa Rica) and established in Southern Florida, USA
  • Habitat: Tropical forests, gardens, and urban landscapes with diverse flowering plants
  • Social Structure: Solitary (though multiple females may occasionally share a communal nest)
  • Nesting/Breeding: Cavity nests constructed from resin, mud, and plant materials
  • Conservation Status: Not Evaluated (NE)
  • Population Trend: Increasing

The metallic green orchid bee (*Euglossa dilemma*) is a breathtaking, jewel-like insect renowned for its brilliant, iridescent green exoskeleton that shimmers with a metallic luster. Often mistaken for a flying gemstone, this solitary bee possesses a remarkably long proboscis—sometimes exceeding the length of its own body—which allows it to nectar from deep, tubular flowers inaccessible to most other pollinators. Its most captivating feature is the specialized behavior of the males, who meticulously "harvest" scents from orchids, fungi, and even decaying matter, storing these aromatic compounds in unique, swollen pockets on their hind legs to create a complex perfume used to attract mates. Originally native to Central America and now established in Florida, this vibrant pollinator is a masterpiece of evolutionary specialization, blending striking aesthetics with a sophisticated chemical courtship ritual.

Fun Facts

Male metallic green orchid bees act like tiny perfumers, spending their lives collecting volatile compounds from orchids, fungi, and even rotting wood to store in specialized pockets on their hind legs. They mix these scents into a complex "cologne" used to woo females during elaborate hovering displays. To access nectar from deep-throated flowers, these bees possess remarkably long tongues that can exceed their own body length, neatly tucking them under their bodies when not in use. Despite their vibrant appearance, their brilliant, jewel-like shimmer is actually a result of microscopic structures on their exoskeleton that refract light rather than simple pigmentation, and unlike the females, the males lack a stinger entirely.

Habitats & Distribution

This species is native to Central America, maintaining a natural range that extends from Mexico southward to Costa Rica. Beyond its native territory, it has successfully established a significant non-native population in the United States, where it is now commonly found throughout southern and central Florida. In these regions, it inhabits a wide variety of environments, ranging from dense tropical and subtropical forests to more open, human-altered landscapes. It is frequently observed in suburban gardens, urban parks, and agricultural areas, showing a high level of adaptability to any environment that provides a steady supply of flowering plants for nectar and essential aromatic compounds.

Behaviours & Reproduction

Males exhibit a specialized behavior of collecting aromatic compounds from orchids, fungi, and decaying wood to create a complex chemical bouquet. Using specialized brushes on their forelegs, they gather these scents and store them in cavities within their enlarged hind tibiae. During the mating season, males congregate at display sites called leks, where they hover and release these perfumes to attract females. This unique reproductive strategy ensures that females select mates based on the quality and variety of the scents collected, which serves as a proxy for the male's fitness and foraging proficiency. The species generally follows a solitary or communal social structure, though it can display primitive eusociality. Females construct nests in small cavities using collected resins, mud, and plant materials. Each cell is mass-provisioned with a mixture of nectar and pollen before a single egg is laid. In some instances, a mother and her female offspring may share a nest, with the older female often remaining to guard the brood while the younger individuals forage, representing a transitional stage toward more complex social organization.

Diet

The metallic green orchid bee (Euglossa dilemma) primarily consumes nectar from a wide variety of flowering plants to fuel its high-energy flight, while females also collect pollen to provide essential protein for their developing larvae. A fascinating and unique aspect of their dietary behavior involves the males, who forage for non-nutritive volatile compounds rather than just food. These males visit specific orchids, fungi, and even rotting wood to "collect" aromatic chemicals using specialized brushes on their front legs, which they then store in inflated pockets on their hind legs. This complex bouquet of scents is not eaten but is instead used as a chemical perfume to attract females during courtship displays, making these bees critical pollinators for many orchid species that offer fragrance as a reward instead of nectar.

Colors

The *Euglossa dilemma* possesses a brilliant, uniform metallic green exoskeleton with an intense iridescent sheen that can shift toward blue, gold, or bronze. Unlike typical fuzzy bees, its body is notably smooth and polished, featuring subtle punctations and specialized slits on the hind legs of males for scent collection. This vivid structural coloration acts as disruptive camouflage, allowing the bee to blend into the shimmering, sun-dappled leaves of its tropical habitat.