Alfred Newton, 1911 Encyclopædia Britannica, Volume 28… (1911)
“ They have a remarkably loud song, and in consequence are highly valued on the continent of Europe, where two species at least spend the summer. One of them, H. icterina, has occurred more than once in the British Islands, and their absence as regular visitors is to be regretted. Among the minor characteristics of this little group is one afforded by their eggs, which are of a deeper or paler brownish pink, spotted with purplish black. Their nests are beautiful structures, combining warmth with lightness in a way that cannot be fully appreciated by any description. ”
