Bird Notes, Part 2, v659
Page 87
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
order to distinguish him from his fellows and as his "nose" mark is even more conspicuous now, while his actions are also somewhat "snoopy" the name is appropriate). Greenie fed Snooty with worms and then went off to dig. I showed a worm to Snooty and he gradually came to within about a foot of my hand; apparently not afraid, but uninformed. I dropped the worm in front of him and he pushed it around with his bill, turning it over and over, without seeming to be sure that it was supposed to be eaten. Finally he picked it up and carried it about without making any visible effort to swallow it , at the same time giving the impression that he was looking for another bird to whom to feed it. He then saw Greenie, now about fifteen feet away, ran to him, stood facing him a few inches away, whereupon Greenie reached forward, took the worm, tapped it a few times on the ground and then pushed it down Snooty's throat. Snooty had opened his mouth for it as soon as Greenie took it from him. It looks as if this young bird had not definitely learned to associate a worm on the ground with food and on picking it up tentatively was either uncertain as to whether it should be swallowed or had not learned the manipulations necessary to to get it from the tip of his beak and headed in the right direction. Greenie clearly was the proper authority to whom to appeal in this dilemma, since anything offered by Greenie is something to open up for to the fullest extent. This may be the anthropomorphic point of view; doubtless an exact explanation can be formulated on the basis of associations and reflexes . In the light of this incident where a worm is taken to a parent, the explanation of the young thrashers of brood No.1 taking worms to each other, may be different than at first conjectured in these notes. Apparently a worm in the bill of another bird is worth two on the ground if one is young enough.