On tue les oiseaux, les insectes se multiplient, les récoltes sont compromises. L' auteur dit que ces trois lignes résument les causes et les effets du mal dont nous souffrons. Les oiseaux, par leurs chants mélodieux et leur plumage aux couleurs variées, font le charme de nos campagnes.
The fact that most courses in vertebrate embryology deal to a greater or lesser extent with the chick seem to warrant the treatment of its development in a book designed primarily for the beginning student.
Arkansas is remarkable for the abundance and variety of its bird life, and many interesting problems of distribution are presented as a result of its topography and geological position.
The principal method used by the Biological Survey in investigating the food habits of birds is an examination of the contents of stomachs, the material for which is obtained from all parts of the United States. In case of each species the separate data accumulated by examining as many stomachs as possible are tabulated and show the food of the bird in question to consist of various proportions of certain elements.
The native sparrows are the most abundant and widely distributed of the small birds inhabiting the rural districts of the United States. Wherever there are farms these characteristic little birds may be found nesting in orchard, berry patch, vineyard, or hedgerow, enlivening the shrubbery from dooryard to outlying field with their songs, or in winter rising from the ground and fluttering from bush to bush before one who invades their haunts.
In response to numerous complaints from fruit growers concerning depredations by birds in orchards and vineyards in the Pacific coast region, the investigation of the subject was undertaken by the Biological Survey.
Two distinct groups of finches or sparrows are commonly known as grosbeaks. One of these, which includes the pine and evening grosbeaks, is of little practical importance, since its members breed and pass most of their lives in mountainous regions, or in the northern parts of North America. The other group includes the cardinal, gray, rose-breasted, black-headed, and blue grosbeaks, which spend either the summer or the entire year within agricultural regions of the United States.
