[2] Large numbers of unrelated females will typically share a single nest, a behavior referred to as "communal".

[4] L. hemichalceum will typically begin creating new colonies during the summer,[5] with brood production from late November through the first few months of spring.

[7] As the size of the colony increases, the reproductive potential of each female does not change, unlike many species of bees.

[9] Lasioglossum species which occupy parts of Africa and central Europe demonstrate varying types of social behavior—ranging from solitary to communal and even semi-social.

[9] Lasioglossum hemichalceum can be identified by its medium long antennas, often off-white in color, and triangular head.

[10] Males typically have thinner bodies than females and also have less hair on their hind legs for carrying pollen.

[10] In addition, the legs of L. hemichalceum tend to be dark brown or black in color, although there have been instances of red-brown pigmentation.

[10] There are two morphs of male Lasioglossum hemichalceum: those with typical proportions and small in size, or those referred to as macrocephalic.

[12] Their environment in southern Australia is one that has wet winters that are fairly mild and summers that are warm and dry.

[13] Nests are not frequently built above ground and are typically constructed by separate groups of egg-laying females.

[14] Colony initiation starts late in the month of November and typically ends in the early spring, around February or April, after females have overwintered.

[4] The number of total bees that inhabit the nest will typically reach over 100, with a larger percentage of females than males.

[15] Once the eggs have been laid, the egg-laying females will construct individual brood cells, each with a certain amount of nectar and pollen.

[14] This has demonstrated that interactions between group members are not restricted to kin, and that L. hemichalceum tend to differ from solitary or eusocial species.

[6] In order to mate with resident females, macrocephalic males will fight each other until they are severely injured, and even kill each other.

[6] If a female needs to exit the nest to obtain nectar or pollen, it is sometimes better to take advantage of this opportunity and mate outside the colony.

[3] These statistics seem to reveal that parental care is highly generalized[3] and occurs in the absence of kin selection and is probably related to the fact that females act indiscriminately towards each other.

[3] Nest switching and migratory behaviors also result in the decreased genetic relatedness among adults and their respective kins.

[14] L. hemichalceum tends to avoid inbreeding whenever it is possible because of their sex determination system, which uses a single locus mechanism.

[14] For sister-sister relatedness there tends to be a significant number of full sister relationships within the colony among juveniles.

[14] Along the same lines, sister-brother relatedness is low within the same nest because the females tend to leave if there are male relatives nearby.

[3] While many members may be living with unrelated individuals (about 50% of adult females do not have daughters or sisters of any type nearby in the colony),[3] they gain many advantages.

[3] It takes approximately six weeks for a larva to reach adulthood, and by having other adults nearby that are able to guard the nest, the risk of predation from ants is significantly reduced.

[3] While the presence of adult L. hemichalceum is effective at warding off unwanted predators, such as ants, there are no active defense behaviors.

[7] Agonistic behaviors typically include patterns such as lunging or moving their bodies in the shape of a C while pointing the stinger and mandibles towards the offender.