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INSTINCT AND INTELLIGENCE IN BIRDS
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Fig. 24. Huge boring of Pileated Woodpecker in a white pine two feet in diameter, to reach galleries of the carpenter ants, seven feet from the ground, where the insect gained entrance; illustrating either instinct to follow sounds, or intelligence in adapting means to end.
Fig. 25. Sound Pine Chips from Workshop of Pileated Woodpecker, shown in Fig 24; some are bent or broken with the wrenching stroke of the bill. Natural size.
