Predation of free-range chickens by invasive House Crows Corvus splendens in Dodoma, Tanzania

Abstract

This study reports on the perspectives of local farmers on predation on chickens by the invasive House Crow Corvus splendens, together with their coping strategies, in Dodoma, Tanzania. A survey was conducted among 391 farmers of free-range chickens in urban and peri-urban areas. Using a questionnaire and point counts, the study revealed that urban areas had a higher abundance of House Crows than peri-urban areas, largely attributable to increased availability of disposed waste. There was significantly greater predation in peri-urban than urban areas. Chicks and eggs had the highest predation rates, with chicks being the preferred prey. There was a negative correlation between the predation rate and the numbers of hens and chicks. To deter House Crows, farmers used techniques such as chasing and shouting. Effective predation control strategies should consider both the predation intensity and proximity to urban areas. While the farmers’ methods were environmentally friendly, innovations are needed to optimise their efforts to control House Crow predation on backyard poultry. Further research is therefore essential for sustainable solutions in this context.