The homing instinct in birds and animals is one of their most remarkable traits: their strong local attachments and their skill in finding their way back when removed to a distance.
The very idea of a bird is a symbol and a suggestion to the poet. A bird seems to be at the top of the scale, so vehement and intense is his life, large-brained, large-lunged, hot, ecstatic, his frame charged with buoyancy and his heart with song.
Not so the oven-bird, or the other birds that walk, as the cow-bunting, or the quail, or the crow. They move the head forward with the movement of the feet.
Like tens of thousands of others, I have been a spectator of, rather than a participator in, the activities – political, commercial, sociological, scientific – of the times in which I have lived.
The building of cities and towns, the cutting down of forests, and the draining of pools and swamps have deprived American birds of their original homes and food supply.
Our flying squirrel is in no proper sense a flyer. On the ground, he is more helpless than a chipmunk, because less agile. He can only sail or slide down a steep incline from the top of one tree to the foot of another.
If one gains an interest in the history of the earth, he is quite sure to gain an interest in the history of the life on the earth. If the former illustrates the theory of development, so must the latter.
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