A Proposal for Methods of Monitoring the Black-Naped Tern and Roseate Tern-Counting of the Nest Number and Assessing the Egg Laying Period Based on Estimated Age of Chick by Observation From Outside the Colony-
Journal of the Yamashina Institute for Ornithology - Japan
doi 10.3312/jyio.40.125
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Date
January 1, 2009
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Yamashina Institute for Ornithology