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This animation demonstrates the anatomy of birds through the example of mallards.
A species of monkeys with complex social structure where hierarchical system can be clearly...
The archaeopteryx shows characteristics of both birds and reptiles. It is probably the...
A transitional form between fish and tetrapods, or four-limbed vertebrates.
The most ancient group of animals, they live underwater, lack real tissues and body symmetry.
The best known cartilaginous fish, sharks, do not chew their food; they use their razor-sharp...
Pelicans are highly protected birds. They can be easily recognised by their pouched bill.
The poisonous bite of the Chilean recluse spider poses a serious threat to human health.