Sampling Forest Canopy Arthropods Available to Birds as Prey

  • Robert J. Cooper
Part of the Lecture Notes in Statistics book series (LNS, volume 55)


A method of sampling canopy arthropods using direct observation is presented whereby the abundance of different types of arthropods (flying, foliage dwelling, etc.) can be directly compared because the same sampling unit (numbers/leaf area) is used. Total leaf surface area in patches of directly observable foliage was determined by using leaf length/surface area equations. Estimates of relative abundance of different arthropod taxa were used to compare with percent composition of those taxa in diets of canopy foraging bird species. A total of 6,802 arthropods was identified in 1404 samples containing 197,964 leaves. Examples of arthropod abundance estimation and assessment of use versus availability of arthropod prey are provided from one month (May, 1986) of the study.


Observable Foliage Prey Category Yellow Warbler Arthropod Taxon Eastern Deciduous Forest 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • Robert J. Cooper
    • 1
  1. 1.Forest Arthropod Research TeamDivision of ForestryMorgantownUSA

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