ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] In the first place, songs and call notes of about twenty species of small birds (fifteen of them in the wild, the rest in captivity) were tested qualitatively for the existence of frequencies between 15 and 50 kc./so About ten of these, including robin (Eriihacus rubecula), grasshopper warbler ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/193595a0
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