Dusan Rak is a biologist and one of the founders of the Anitra System company. They specialize in technological solutions for animal tracking (so-called telemetry). Their main products are GPS loggers for monitoring birds and other animals. These devices are able to send data via mobile phone networks anywhere in the world, mapping even the vast distances migratory birds travel during each of their migrating seasons.
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Company website: https://anitracking.com/