Impact global
The vast expansion of the Eurasian collared-dove is believed to result in competition with other bird species including mourning dove (Zenaida macroura), turtledove (Streptopelia turtur). They may threaten agriculture as they are known to eat and foul grain products. They are considered a crop pest in Pakistan (Roberts, 1991). Streptopelia decaocto is also a carrier and amplifying species for West Nile virus since antibodies have been recorded in S. decaocto. Researchers have indicated it as an amplifying bird, meaning a species which lives in areas of abundant ornithophilic mosquitoes and can act as a host, contributing to the proliferation of the virus (Jourdain et al, 2007). S. decaocto is also a carrier of the Pigeon circovirus which causes illness and mortality in the Columbiformes family (Kubicek & Taras, 2005).
Étude de cas sur les impactsGuadeloupe  
Compétition: Du fait de l’accroissement de son aire de distribution, il est probable que cette espèce rentre en concurrence avec la Tourterelle à queue carrée (Zenaida aurita), espèce indigène.
Hybridation: L’hybridation avec la tourterelle indigène Zenaida aurita est évoquée. Martinique
Compétition: Du fait de l’accroissement de son aire de distribution, il est probable que cette espèce rentre en concurrence avec la Tourterelle à queue carrée (Zenaida aurita), espèce indigène.
Hybridation: L’hybridation avec la tourterelle indigène Zenaida aurita est évoquée. United Kingdom (UK)
Compétition: Streptopelia decaocto colonized the UK and surpassed native turtledove (Streptopelia turtur) in abundance and competes with it for resources (Hudson, 1965). Florida (USA) (United States (USA))
Compétition: Streptopelia decaocto likely competes with the mourning dove (Zenaida macroura) in the United States. They exhibit significant dietary overlap, similar habitat requirements, and aggressive behavior between eachother (Poling and Hayslette, 2006).
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