April 1973 – vol. 66, issue 4, pp 147–156 Gatherings of Grey Herons Ardea cinerea at traditional standing-grounds during the breeding season have been noted by several authors (Beetham 1910, Huxley 1924, Lowe 1954, Milstein et al. 1970), and the behaviour of the birds at these standing-grounds has been investigated (Birkhead 1973). Gatherings of herons outside the breeding season seem to have attracted less attention (see pages 162-163 in... This article is only available to registered users.To read more, please log in or purchase a subscription.