Doctor Dolittle in the Moon by Hugh Lofting

We were after all, when you come to think of it, a very odd party, this, which made the first landing on a new world. But in a great many ways it was a peculiarly good combination. First of all, Polynesia: she was the kind of bird which one always supposed would exist under any conditions, drought, floods, fire or frost. I've no doubt that at that time in my boyish way I exaggerated Polynesia's adaptability and endurance. But even to this day I can never quite imagine any circumstances in which that remarkable bird would perish. If she could get a pinch of seed (of almost any kind) and a sip of water two or three times a week she would not only carry on quite cheerfully but would scarcely even remark upon the strange nature or scantiness of the rations.

Then Chee-Chee: he was not so easily provided for in the matter of food. But he always seemed to be able to provide for himself anything that was lacking. I have never known a better forager than Chee-Chee. When every one was hungry he could go off into an entirely new forest and just by smelling the wild fruits and nuts he could tell if they were safe to eat. How he did this even John Dolittle could never find out. Indeed Chee-Chee himself didn't know.