Opportunistic bird species - enhancements for the monitoring of populations
Author(s): Marchant, J.H., Wilson, A.M., Chamberlain, D.E., Gregory, R.D. & Baillie, S.R.
Published: January 1997 Issue No.: 176 Pages: 70pp
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One bird, twelve journeys, 60 000 miles and invaluable scientific data: PJ the Cuckoo has left an incredible legacy.
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