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Evaluation of the Bird Conservation Area Concept in the Northern Tallgrass Prairie Annual Report: 2000

Table 5


Table 5.  Causes of nest failure, by study region, in 2000.
  Crookston Glyndon Sheyenne
Depredated: 136 83 90
    Egg-laying stage 7 0 1
    Incubation stage 42 41 64
    Nestling stage 37 42 25
Cowbird predation 0 0 18
Weather-related 10 7 0
Trampled 1 1 13
Unknown 0 1 3
Abandoned: 24 17 40
    Partial predation 3 7 23
    Partial cowbird predation 0 0 4
    Cowbird parasitism 0 1 5
    Unknown 21 9 8

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