three rare Species of .Britifh Biyds. 27 
yards from the firft chofen fpot till the young take wing, when 
they quit the lower branches,’ and take to the higheft trees, 
fearching for infeéts amongft the upper foliage. At this time they 
are not fo vociferous, and have entirely left off that conftant vibra- 
tion of their wings, which feems peculiar to the courting and incu- 
bating feafon. 
It is not to be fuppofed that this {pecies is a new or accidental vi- 
fitant to thefe parts, but that its near refemblance in fize and colour 
tothe Yellow Wren has probably occafioned it to be miftaken for that 
‘bird. But whoever will bring them together will at once obferve, that 
the plumage of this is much more vivid; the ftroke above the eye 
of a much brighter yellow ; and, as a {pecial charaéteriftic mark, the 
belly and under tail-coverts are invariably of a pure white, which 
in the Yellow Wren are tinged, and the latter part dafhed with 
yellow. ‘There is no diftinétion in the plumage of the fexes of 
either {pecies: this fhould not therefore be miftaken for the male 
of the other, which doubtlefs has often been the cafe; neither 
fhould it be confounded with the Hippolais, that bird being much 
inferior in fize, and none of the under parts of a pure white: its 
legs are alfo dufky, in which it differs from both the Sylvicola and 
the Trochilus. Befides, were every other mark of diftin&tion wanting, 
the note, manners and habits of this widely differ: this only in- 
habits woods in the breeding feafon: its ery, for it cannot be called 
a fong, bears not the leaft refemblance to any other fpecies: the 
firtt part feems to exprefs the word twee drawn out to fome 
length, and repeated five cr fix times fucceffively, terminating in 
notes fomething of the fame tone, but delivered in.a hurried man- 
ner, fhaking its Wings at the fame time. This f{pecies weighs about 
two drams forty grains; the length five inches and a quarter: the 
bill is dufky ; irides hazel: the upper part of the head, back, {ca- 
Balafts and upper coverts of the tail,, are of a lively yellow green: 
over 
