No, I am not completely convinced by the inference that the frog has about the nightingales character. The nightingale is, in reality, a gullible bird but the frog portrayed her as a greedy and untalented bird. She won over the heart of her audience time and again with her original lyrics and compositions whereby the frog charged her with being stale. She was much better a singer than the frog but he made her take lessons from him. The frog presented the nightingale exactly the opposite to what she really was.