Crows, ravens, magpies, and jays are among the most cognitively sophisticated birds. Their welfare in pest control, research, and urban environments raises distinctive ethical questions.
The cognitive sophistication of corvids means their welfare experiences — including stress, boredom, social loss, and fear — are likely richer than simpler birds. Lethal control of corvids in the UK under general licence occurs without oversight and involves shooting, trapping (Larsen traps) and killing — trap-caught corvids may be confined for many hours. Research using corvids must navigate high welfare standards appropriate for cognitively complex animals. Urban corvids that become habituated to humans face conflict when they are subsequently deterred or killed. The intelligence of corvids means they may learn fear responses from witnessing the killing of conspecifics.