Formica obscuripes (Western Thatching Ant)

Formica obscuripes (Western Thatching Ant)

Canada Ant Colony
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Formica obscuripes, or the Western Thatching ant is a large attractive species which spans central and western Canada. It can be identified on the landscape by it's conspicuous thatched mounds, used to regulate temperature. It is said that while there is still snow on the ground, the mound can exceed 25 degrees C. Due to their ability to regulate their environment, these ants have the ability to grow much larger than many of the other species in Canada. Western Thatching ant workers rival those of carpenter ants in size, at frequently close to 14mm in size. Colonies are large and often interconnected, and in the wild, these colonies are very polygynous as a result of secondary polygyny, where they accept queens back to the nest

What's a Test Tube Insert?

Test tube inserts are upgrades to the test tube setups provided. If purchased, they come with a dark hood to lower light levels for the colony, an insert which provides a living space, and a feeding insert to provide food for the colony.

Ungrouted inserts are a blank plastic insert which helps provide a more suitable space for the ants to grip (as opposed to glass tubes), while grouted inserts are bedded with a substrate which helps distribute humidity more evenly throughout the test tube, and helps certain ants create their cocoons more easily. Overall, grouted inserts are more comfortable for the ants.

You will NOT need an insert for colonies in test tubes, but it does help for certain species. IF you are moving the ants into a nest immediately, do NOT get a test tube insert.

Hey! This is a live product. If you are purchasing ants during the winter months, please remember to purchase the "Winter Shipping (Live Guarantee) (72 hour heat pack + 1 inch foam cushion)" in order to guarantee the order.

Just a warning, we will NOT ship live ants into the US unless the receiver has a permit. If such an order is made, it will be refunded, minus a 10% processing fee and restocking fee

This product is from Canada Ant Colony. The full catalogue, including all variants, can be found at



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