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6 results for “bill length”
Sanderling Calidris alba bill lengths at non-breeding areas at various latitudes
<p>The data file contains data of bill lengths of 2,866 individual Sanderlings (<em>Calidris alba</em>) captured at winter locations between northern Scotland and Namibia. “lat” indicates the latitude of capture in decimal degrees, where “bill” is the measured bill length in mm. Further details can be found in the methods section in the manuscript.</p>
Figure. Measurement data plotted for all nestlings as a function of age for the black stork: a) wing length (WL), b) head length (HL), c) bill length (BL), and d) tarsus length. in Age estimation of black stork (Ciconia nigra) nestlings from wing, bill, head, and tarsus lengths at the time of ringing
Figure. Measurement data plotted for all nestlings as a function of age for the black stork: a) wing length (WL), b) head length (HL), c) bill length (BL), and d) tarsus length.
Data from: Multiple reversals of bill length over 1.7 million years in a Hawaiian bird lineage
Evolutionary change has been documented over geological time, but reversals in morphology, from an ancestral state to a derived state and back again, tend to be rare. Multiple reversals along the same lineage are even rarer. We use the chronology of the Hawaiian Islands and an avian example, the Hawaiian honeycreeper 'amakihi (Hemignathus spp.) lineage, which originated on the oldest main island of Kaua'i 1.7 million years ago, to examine the process of sequential reversals in bill length. We document three single and two multiple reversals of bill length on six main islands from oldest to youngest, consistent with the phylogeny of the lineage. Longer bills occur on islands with endemic species, including phylogenetically relevant outgroups, that may compete with or dominate the 'amakihi. On islands without those species, the 'amakihi had shorter bills of similar length. Both types of reversals in morphology in this lineage integrate microevolutionary processes with macroevolution in the adaptive radiation of Hawaiian honeycreepers.
Data from: Multiple reversals of bill length over 1.7 million years in a Hawaiian bird lineage
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Data from: Genomic associations with bill length and disease reveal drift and selection across island bird populations
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Morphometrics of taxa in the genus Sphenopsis, recorded from adult male (n = 21) and female (n = 15) study skins in the Academy of Natural Sciences of Drexel University, Philadelphia (ANSP) and Delaware Museum of Nature & Science, Greenville (DMNH) collections. Sample sizes and means (± SD) are given for each taxon, within each sex class (female, male), for the following variables: (WG) wing length, (TR) tarsometatarsus length, (TL) tail length, (BL) bill length, and (BW) bill width. All measurements in mm. in Taxonomic status of the Western Hemispingus Sphenopsis ochracea (Thraupidae) and a review of species limits in the genus Sphenopsis P. L. Sclater, 1861
Morphometrics of taxa in the genus Sphenopsis, recorded from adult male (n = 21) and female (n = 15) study skins in the Academy of Natural Sciences of Drexel University, Philadelphia (ANSP) and Delaware Museum of Nature & Science, Greenville (DMNH) collections. Sample sizes and means (± SD) are given for each taxon, within each sex class (female, male), for the following variables: (WG) wing length, (TR) tarsometatarsus length, (TL) tail length, (BL) bill length, and (BW) bill width. All measurements in mm.
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