Estimating Bird Damage to Rice in Africa: Evidence from the Senegal River Valley

Yann De Mey, Matty Demont*, Mandiaye Diagne

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

39 Citations (Scopus)


Granivorous birds, mainly the Red-billed Quelea, have subsisted on cereal crops in Africa for centuries and have caused substantial damage. There is, however, limited recent evidence on their impact. We propose an indirect method to estimate bird-inflicted crop losses by fitting a production function with a damage abatement component and pest intensity slope dummies on a panel database of rice farmers in the Senegal River Valley. This allows us to estimate both bird damage and marginal productivity of bird control at different levels of bird pressure. Annual bird damage is found to average around 13.2% of the potential rice production during the wet seasons of 2003-2007, which translates into an average annual economic loss of 4.7 billion FCFA (€7.1 million). Our results are consistent with farmers' perceived bird-inflicted crop losses, averaging 15.2%. More alarmingly, we observe declining marginal productivities of bird control under increasing bird pressure. Farmers indicate that at high bird pressure, the efficacy of traditional bird scaring methods is inadequate, which suggests that predictive (monitoring), preventive (population control) and protective (insurance) measures against massive invasions are more urgent than improving the average efficacy of curative measures (pest control). These findings are especially relevant to farmers and policy-makers who are currently struggling to implement an ambitious food self-sufficiency programme in Senegal.

Original languageEnglish
Pages (from-to)175-200
Number of pages26
JournalJournal of Agricultural Economics
Issue number1
Publication statusPublished - Feb 2012
Externally publishedYes


  • Damage control productivity
  • Food security
  • Nonlinear estimation
  • Panel data
  • Sub-Saharan Africa


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