NOTES ON TWO MORE SALMON-RIVERS. 
141 
opinions have been expressed on the singing powers of 
the Icterine warbler, and different ears are perhaps apt 
to emphasize different notes. No doubt its normal 
song resembles that of the thrush, and it is also probable 
that its highest degree of excellence is attained at the 
most northern points of its range. 
fieldfares are so abundant and so noisy, it was natural 
that this mocking-bird should imitate them to perfec¬ 
tion ; but at times the song also caught the flute-like 
notes of the canary, and we recognized the resemblance 
to the song of sedge-warbler and house-martin. Various 
o o 
fieldfares’ nests on the forde. 
