Natural selection on bill characters in the two bill morphs of the African finch Pyrenestes ostrinus
Published Work 1990 | Evolution 44(4), 832–842
Natural selection on bill characters in the two bill morphs of the African finch Pyrenestes ostrinus
Published Work 1990 | Evolution 44(4), 832–842
Published Work 1990 | The Auk 107(1), 153–160
Portable device for measuring seed-hardness
Published Work 1989 | Journal of Field Ornithology 60(1), 56–59
Blood parasites of birds in Cameroon
Published Work 1988 | The Journal of Parasitology 74(6), 1009-1013
Bill size polymorphism and interspecific niche utilization in an African finch
Published Work 1987 | Nature 329, 717-719
Published Work | Biological Journal of the Linnean Society 71(4), 737–753