Note 54 — THE PRIMEVAL FORESTS OF CENTRAL AFRICA.
Margaret R. Thomson translation
[Note 54] p. 223.—And they know that this is so.
Brehm suggests here and elsewhere what it would be difficult to prove, that animals which have unconsciously acquired protective colouring, and which instinctively crouch or lie still instead of trying to escape by flight, are aware of their adaptation to concealment. There seem to be but few cases which give countenance to this supposition.