Messor structor - Beginner Species - Medium in Size

The Polygynous European harvester ant (Heat may be required)

Messor structor is a type of harvester ant that is less common than Messor barbarus. It is characterized by its shiny black exterior and red/brown heads on some workers. This species is known for its polymorphism, which refers to the different sizes of its workers. Messor structor is typically found in fairly dry areas, such as steppes and other harsh landscapes, and is commonly found in Spain, Portugal, and other countries in various environments such as olive plantations, mountains or hilly areas on the outskirts of cities, and parks.

Harvested seeds are eaten by the ants, using the large Majors jaws to de-shell them. They are then chewed into a protein rich food source known as "ant-bread". It is this ant-bread that M,structor get 95% of their nutrients from.

M.structor are also Polymorphic. They will produce larger majors who can split the toughest of shells and defend the colony.

Harvesters make great beginner species. It is worth noting however that they do require a humidity gradient to store seeds in a dry section of the nest. They are also prone to drowning, open water sources should be avoided in favour of ones which use mesh or cotton.

In addition to being pretty ants they are also almost entirely graminivorous. They primarily and almost exclusively eat seeds and grains with very little need for additional protein. M.structor have been noted as only taking insects if one poses a threat on a trail or a dead one is found.

Colony Size

Excess of 10,000 workers

Slow growth until 30 to 50 workers

Queen Age

Up to 18 years

Polygyne

Fully Claustral - no food until first workers

Temperature & Humidity

22 to 26 degrees nest | 25 to 30 outworld

50% to 70% Nest (Lower for seed store) | 30% to 50% outworld

Hibernation

Yes - November to March at 11-15 degrees