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Marsh harriers are birds of prey found almost worldwide.
A species of mollusc widespread in freshwaters.
Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and...
Predators on top of the food chain prey on other animals. Their relationship is hunter and hunted.
Bottlenose dolphins are sea mammals which use ultrasound for orientation.
This animation demonstrates the anatomy of spiders through the example of a common...
A video about the mammals living in the cold climate zones of the Earth, like the polar bear,...
One of the most common types of flatworms.