About 1,000 northern hairy wood ants are expected to have tiny radio tags, about 0.04 inches (1 millimeter) long, attached to their bodies, allowing researchers to track their movements on a protected English estate.

The which get their name from the “eyebrows” visible through a microscope housed within nests connected by trails worn into the ground by years of ant traffic. The biologist doing the work, Samuel Ellis of theUniversityofYork, intends to examine how the ants interact with one another.

The results are expected to help staff at the Longshaw Estate in Derbyshire manage the estate — a natural and archaeological site —with the ants’ needs in mind.

“I think this is a world first. It has not been done in the wild before,” said Ellis in a video produced by the U.K. National Trust, which manages the estate.

‘I think this is a world first. It has not been done in the wild before.’

– Samuel Ellis of theUniversityofYork

Ellis is not certain how long they will stay attached to the insects.

“The tags act like a bar code,” he said in the video. “It gives each ant an individual identity and what this means is you can see which ants are going where and how individual ants interactions work together to make the colony long behaviors.”

An estimated 50 million hairy wood ants, Formica lugubris, inhabit the estate. They are the largest species of ants native to theBritish Isles with workers reaching up to 0.4 inches (10 mm) long. To get food for their young, the ants gently stroke sap-sucking aphids, which then produce honeydew; in return, the ants protect these aphids.

The ants defend themselves from predators by spraying smelly Vinegar-like formic acid.

Some birds, like Jays and Green Woodpeckers, use the formic acid spray as a cleansing agent to get rid of parasites, according to theUniversityofYork.

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