Alfred Newton, 1911 Encyclopædia Britannica, Volume 28… (1911)
“ The wryneck commonly lays its translucent white eggs on the bare wood of a hole in a tree, and is one of the few wild birds that can be induced to go on laying by abstracting its eggs day after day, and thus upwards of forty have been taken from a single hole—but the proper complement is from six to ten. ”
