Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Brian G. Tavernia; Mark D. Nelson; Rebecca Rau; James D. Garner; Charles H. Perry
    Date: 2018
    Source: The Journal of Wildlife Management
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: Download Publication  (739.0 KB)


    The American Woodcock Conservation Plan calls for halting and reversing declines of American woodcock (Scolopax minor) populations through creation and management of early successional forest (ESF). Counts of displaying male woodcock along routes of the American woodcock singing‐ground survey (SGS) are used to assess regional population status and trends, and there is a need to assess whether SGS routes represent the region. We assessed whether individual SGS routes (330‐m buffers) in the Boreal‐Hardwood and Prairie‐Hardwood Transitions of Minnesota, USA represented land covers within local landscapes, defined using simulated 10‐minute blocks, and whether the routes, in aggregate, represented land covers of our study region. Our land covers included non‐forest classes, age‐based ESF (≤20 years), and persisting classes for deciduous‐mixed and evergreen forests and woody wetlands. We found that the median value of mean absolute differences (MAD) between percentages for route buffer and block cover classes was 3.78 percentage points. Twenty‐two of 81 (27%) route buffers had MAD values ≥5 percentage points. Within Minnesota, more of these routes (19 of 22) occurred in the Boreal‐Hardwood Transition than in the Prairie‐Hardwood Transition. Relative to local landscapes, route buffers most frequently and strongly under‐represented open water, barren land, evergreen ESF, persisting woody wetlands, and woody wetland ESF and over‐represented developed land and grassland‐pasture. When we compared routes in aggregate to our study region, the magnitude of percentage point differences for individual covers did not exceed 5, except for open water. Given the relatively small differences we observed, we conclude that SGS routes well represent land covers within our study region.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
    • Our on-line publications are scanned and captured using Adobe Acrobat.
    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, if you notice any errors which make this publication unusable.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Tavernia, Brian G.; Nelson, Mark D.; Rau, Rebecca; Garner, James D.; Perry, Charles H. 2018. American woodcock singing-ground survey sampling of forest type and age. The Journal of Wildlife Management. 82(2): 1794-1802.


    Google Scholar


    aggregation, American woodcock, compositional analysis, early successional forest, forest disturbance, roadside survey, Scolopax minor, singing‐ground survey, young forest

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page