ABOUT twelve years ago Prof. Huxley had taken up the subject of the classification of birds in his usual zealous and original way, and from quite a new point of view. Prof. Huxley, treating birds ...
National Geographic estimates there are between 50 billion and 430 billion birds populating the planet, outnumbering humans by up to approximately 50 times. Spread across 9,700 species, according to ...
PROF. GAMBLE'S account of the animal world is written from the point of view of function. Its chief aim is to direct attention to the adaptations of structure to the performance of movement, breathing ...
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