Alfred Newton, 1911 Encyclopædia Britannica, Volume 13… (1911)
“ Of late years, partly owing to the withdrawal of the protection they had enjoyed, and still more, it would seem, from agricultural improvement, which, by draining meres, fens and marshes, has abolished the feeding-places of a great population of herons, many of the larger heronries have broken up—the birds composing them dispersing to neighbouring localities and forming smaller settlements, most of which are hardly to be dignified by the name of heronry, though commonly accounted such. ”
