Leander S. Keyser, Our Bird Comrades
“ Indeed, the warbler's favorite method of going about is with his head directed toward the sky rather than the reverse, while it really seems that the nuthatch's predilection is to scuttle about in an inverted position. Does he wish to chisel a grub out of the bark of a tree? He usually stands above the target at which he aims, so that he can deliver his blows with more force, just as the human woodchopper prefers to take his position above and not below the stick or log upon which he expects to operate. ”
