Note 11 — SPRING:

Warton observes that the nightingale does not sing till the other birds are at rest. This is a mistake; the nightingale sings by day as well as at night, but the expressions "to rest removes" and "forsaken groves" give an idea of evening, in which case there would be certainly an error in making the thrush "chant" after the nightingale. As to the thrush being "charmed to silence" at any time by the nightingale, and the "aërial audience" applauding, it is allowable as a fanciful allusion, perhaps, though the circumstance is contrary to nature and fact.—Bowles.