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A group of fish characterised by a cartilaginous skeleton, well-known species include the great...
Marsh harriers are birds of prey found almost worldwide.
Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.
The anatomy of annelids is demonstrated through the example of the common earthworm.
Pearls, often used as gemstones, are the by-products of certain molluscs' protective mechanisms.
A type of herbivorous dinosaur easily recognisable by its large frill and three horns which...
One of the most common types of Anatidae, the ancestor of the domestic duck.
Long-necked herbivorous dinosaur with a robust body.