Study

Does the removal of avian brood parasite eggs increase host productivity? A case study with brown-headed cowbirds Molothrus ater and song sparrows Melospiza melodia near Ithaca, New York, USA

  • Published source details Hauber M.E. (2009) Does the removal of avian brood parasite eggs increase host productivity? A case study with brown-headed cowbirds Molothrus ater and song sparrows Melospiza melodia near Ithaca, New York, USA. Conservation Evidence, 6, 83-88

Actions

This study is summarised as evidence for the following.

Action Category

Remove brood parasite eggs from target species’ nests

Action Link
Bird Conservation
  1. Remove brood parasite eggs from target species’ nests

    A replicated, controlled study from 1997-1999 in grassy fields in New York State, USA (Hauber 2009) found that song sparrow Melospiza melodia nests paratised by brown-headed cowbirds Molothrus ater had lower productivity when cowbird eggs were removed, compared to paratised nests when cowbird eggs were not removed (median of 0% of eggs from nests with eggs removed produced nestlings vs. 75% of eggs from nests where cowbird eggs were not removed). There were no differences in the number of song sparrow nestlings surviving to five days old between paratised nests, non-paratised nests and paratised nests with cowbird eggs removed.

     

Output references

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