February 2006 – vol. 99, issue 2, pp 66 That the number of Great Crested Grebes (Podiceps c. cristatus) nesting in some parts of England is largely determined by the frequency of nesting sites of a certain type can, I think, be proved from the remarkable rapidity they show in colonizing an entirely new water. `A new reservoir in the Midlands, completed in 1928, was filled with water for the first time early in January, 1929. The area of... This article is only available to subscribed users.To read more, please log in or purchase a subscription.