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  1. By: Hendricks, P. - Montana Natural Heritage Program. - United States. Bureau of Land Management. - United States. Bureau of Land Management. Lewistown Field Office.
    Publication info: Helena, Mont, Montana Natural Heritage Program, c2000
    Holding Institution: Montana State Library
    Subjects: Baird's sparrow  Bird surveys  Birds  Brewer's sparrow  Brown-headed cowbird  Counting  Fergus County  Geographical distribution  Grasshopper sparrow  Grassland birds  Lark bunting  Long-billed curlew  Montana  Musselshell River (Mont.)  Petroleum County  Ponderosa pine  Roadside transect  Sage thrasher  Sagebrush  Savannah sparrow  Short-eared owl  Sprague's pipit  Upland sandpiper  Vesper sparrow  Western meadowlark  
  1. By: Colihueque, Nelson - Gantz, Alberto - Rau, Jaime R. - Parraguez, Margarita
    Type: Article
    In: ZooKeys
    Volume: 534
    Date: 2015
    Page Range: 135-146
    Publication Info: Pensoft Publishers 2015
    Subjects: Aves  COI  Common Barn Owl  Short-eared owl  taxonomy