Ekanatha das: When he passed that one particular tree, it had quite a lot of foliage on it; and that morning there were a lot of birds in that tree, and they were making racket like anything. It was very noisy to the extent that you couldn’t really hear what you were saying, it was very noisy. Then Prabhupada stopped and looked at the tree and pointed his cane towards the tree and he said, “They are discussing Krishna-katha.” We were all looking, “What?” And then Prabhupada turned around and he kept walking. And we were all…“Really?” Prabhupada was quite serious.
Reference: Remembrances by Yadubara Das- Folio Vedabase