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The most ancient group of animals, they live underwater, lack real tissues and body symmetry.
Pelicans are highly protected birds. They can be easily recognised by their pouched bill.
A gull species typically found on European beaches; it is easily recognisable by the distinctive...
Fish-like marine dinosaurs which resembled dolphins; a good example of convergent evolution.
Based on their life cycle, insects can be grouped into three categories: ametabolous,...
Living fossil, important stage in the evolution of tetrapods.
An extinct group of Cephalopoda, with solid external skeletons. They are excellent index...
Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.