. The birds of California : a complete, scientific and popular account of the 580 species and subspecies of birds found in the state. Birds; Birds. The California Linnet only to review the quasi-personal qualities of these contrasted birds, to make instant choice. If we must have satellites, by all means let us have Native Sons. The Linnet is our best bulwark against the Menace. Not the least interesting aspect of bird study is what we might call comparative genology. By this we mean a study of the vital characters which distinguish species, a study of geno-dynamic values, as distinguish- ed f
. The birds of California : a complete, scientific and popular account of the 580 species and subspecies of birds found in the state. Birds; Birds. The California Linnet only to review the quasi-personal qualities of these contrasted birds, to make instant choice. If we must have satellites, by all means let us have Native Sons. The Linnet is our best bulwark against the Menace. Not the least interesting aspect of bird study is what we might call comparative genology. By this we mean a study of the vital characters which distinguish species, a study of geno-dynamic values, as distinguish- ed from studies of structural fea- tures, habits, psychology, etc. A geno-dynamic appraisal, to be of any value, must involve a pretty thor- ough knowledge of the present status of a given species, its distribution, its associations, its reactions with other species, its adaptation to changing environment. It presupposes a deep knowledge of taxonomic relation- ships and of phylogeny—in short, the racial history of the bird. Its task, as I conceive it, is to estimate the relative value of a species, and to express that value in terms of energy and achievement, noting in each case direction of development, rate of de- velopmental progress, degree of suc- cess or failure, mobility, adaptabil- ity, and the like. Those whose interest has sur- vived the preceding paragraph will be prepared for a geno-dynamic appraisal of the House Finch; but in expressing it we will use common terms, instead of seeking to evolve or further define a special vocabulary, such as every budding science requires. The species Carpodacus mexicanus is of northern extraction, as evinced by its similarity to certain Asiatic forms. It was the first of its genus to flee southward before the advancing ice of the Glacial Epoch; and upon the retreat of the ice, the species quickly accommodated itself to the diverse and rapidly changing conditions of its new home, viz., the highlands of western Mexico and the lower lev
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1923
