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An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.
Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and...
Marsh harriers are birds of prey found almost worldwide.
Extinct species of fish which had thick ´armor´ protecting the head.
Large, extinct species of cats named after the shape of their large canine teeth.
The Northern white-breasted hedgehog rolls into a ball, using its spines to protect itself.
A common inhabitant of forests; it is the ancestor of the domesticated pig.
This species is an excellent example for symbiosis. Living together with sea anemones they keep...