W. Warde Fowler, A Year with the Birds
“ When the first balmy breath of spring brings the celandines into bloom on the hedge-bank, and when the sweet violets and primroses are beginning to feel the warmth of the sun, you may always look out for the Chiff-chaff on the sheltered side of a wood or coppice. As a rule, I see them before I hear them; if they come with an east wind, they doubtless feel chilly for a day or two, or miss the plentiful supply of food which is absolutely necessary to a bird in full song. ”
