例文・使い方で印象づける「trills」の覚え方
スポンサーリンク..." It is noted for drumming withone foot as a call to its mate, and for uttering asuccession of squeaks and trills that serve it as asong... 
Ernest Thompson Seton 「Wild Animals at Home」
...At intervalshe repeats his remarkable little song, composed of a succession ofsweetly modulated metallic trills uttered on the wing...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...It flies swiftly, close to the ground, andalways during its short flight trills out its clear, ringing, rapidlyreiterated cry, which in sound resembles the laughter of a child...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...Call, chimp-chimp,resembling call of Song Sparrow; song, tinkling,rippling, full of trills, runs and grace notes...
Frank M. Chapman 「Color Key to North American Birds」
... The canary-like trills and thin piping notes, long drawn out, which follow vary greatly in different individuals, and in many cases the trills are omitted...
W. H. Hudson 「Birds in Town and Village」
...Sometimes there are two trills on different pitches, and occasionally a final short, low note...
Glen E. Woolfenden 「Comparative Breeding Behavior of Ammospiza caudacuta and A. maritima」
...Saunders writes these trills as:tsup tsup shreeeeeeeeeandtip tish eeeeee shaaaaaaay...
Glen E. Woolfenden 「Comparative Breeding Behavior of Ammospiza caudacuta and A. maritima」
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cantaloupe distinct aline
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