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VOL x1.] FIELD NOTES ON MARSH-WARBLER. 245 
The ground colour is much clearer and less obscured in 
the eggs of the Marsh-Warbler than in Reed-Warbler’s eggs 
and they do not show the heavy markings of green which 
almost hide the ground colour in most eggs of the Reed- 
Warbler. Green is almost absent from Marsh-Warbler’s eggs. 
Tike most Warblers, the Marsh-Warbler sits very lightly 
and slips quietly off the nest into the thick foliage on the 
first sign of alarm, butit may be seen on the nest if the position 
is known beforehand. 
Incubation lasts a fortnight, and when the young are 
hatched the male ceases his song and both the parents feed 
the nestlings with the greatest diligence. The fact that the 
autumnal moult commences in July might also account for 
the silence of the Marsh-Warbler during that month and 
August. 
Once the young have left the nest, very little is ever seen 
or heard of the Marsh-Warblers, nor can they be e.-.ly 
distinguished then from the young of other allied Ww arblers 
which are found abundantly in the same haunts. 
