Euglossa hyacinthina, is a species of the orchid bee tribe Euglossini in the family Apidae.

"Medium sized, large body stature, long-tongued, and fast," E. hyacinthina is characterized by its eusociality and unique solitary life-style.

[2] Additionally, this species has no worker or queen bees and females dominate in an atypical social hierarchy.

Euglossini (orchid bees) is a tribe of Apinae and are mostly characterized as solitary as they display little social behavior.

[4] Among the distinct species of euglossine bees, the genus Euglossa is known for its bright, metallic skeleton.

[6] Researchers have identified from four genes (16S, 28S, cytochrome b, LW Rh) that Bombini and Meliponini (stingless bees) form a clade, but there is uncertainty on whether Euglossini is a sister group to either Apini or Bombini/Meliponini.

[1] A study done that was published in 2003 by Elizabeth Capaldi showed that females and males generally display monomorphism, with the exception of the thorax.

[1] Because this species is of the order Hymenoptera, there was a significant deviation from the 1:1 ratio; in fact, 82% of the population consisted of females.

[8] In the nest are cells that house larvae and store food to ensure its growth; this is commonly known as "brooding".

[4][7] The only tribe in the family Apidae that do not form large colonies are the Euglossini, because they tend to move independently.

[9] In this sense, the mother would be the "queen" and the daughters would be foraging for siblings rather than offspring and would be considered the "worker bees".

After collecting various fragrances throughout its lifetime, the male is ready to unleash this resource to females when wanting to reproduce.

[9] This allows for consumption of high quality nutrients, which improves fecundity and longevity of life and exploit the advantages of parasitism.

Monandry within the Euglossini is consistent with the idea that females select a single mate with the best genes and best fitness based on male fragrance phenotypes.

[10] This process is very cumbersome because females mate only once; there is a lot of energy and risk taking in order for males to be successful.

"Matings are very rarely observed, but reportedly occur in or around the small territories that males defend on vertical perches on tree trunks or stems in the forest understory.

At these perches, the males perform a characteristic display during which they may buzz their wings or show brief hovering flights.

Then, the nonpolar fragrance compounds, such as those containing aromatic rings, dissolve in the lipids and subsequently place in the male Euglossa.

Although the use of fragrances during courtship has not been fully uncovered, many scientists believe the release of this compound before mating allows females to identify genetic quality.

[2] E. hyacinthina are the only species of the apine clade that do not aggregate in large groups or have queen and worker bees.

In contrast, when nests are co-inhabited, other female bees are able to take care of the brood when one is foraging or if one dies unexpectedly.

[8] Müllerian mimicry arises when two or more poisonous species that are not closely related adapt to each other and start mimicking each other's warning signals.

While Eulaema and Eufriesa mimic each other through color scheme and patterns, mimicry within Euglossa is much less obvious because there is less variation.

As Euglossini can fly long distances, with Eufriesea surinamensis holding the record at 23 km, they are responsible for cross-pollinating, which fosters genetic diversity in flora.