Supplementary feeding has variable impacts on nutritional status in forest birds in Ohio, USA

  • Published source details Doherty P.F. & Grubb T.C. (2003) Relationship of nutritional condition of permanent-resident woodland birds with woodlot area, supplemental food, and snow cover. The Auk, 120, 331-336


This study is summarised as evidence for the following.

Action Category

Provide supplementary food for woodpeckers to increase adult survival

Action Link
Bird Conservation
  1. Provide supplementary food for woodpeckers to increase adult survival

    Another analysis (Doherty & Grubb 2003) of the same data as Doherty & Grubb 2002 found that downy woodpeckers Picoides pubescens did not have higher nutritional statuses (judged by the size of feather growth bars) than woodpeckers in unfed control woodlots. The impact on three songbird species is discussed in ‘Provide supplementary food to increase adult survival – Songbirds’.


Output references

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