Magpie fledgling (Pica pica), Adult drinking water, Marton Mere, Magpie fledgling (Pica pica), Adult drinking water, Marton Mere, Blackpool, Lancashire, UK. Despite the wrongful ideas that Magpies are the downfall of UK songbirds, this bird is key in cleaning up, or scavenging, and controlling pests. More of an issue than Magpie predation for songbirds, is the loss of habitat for British songbirds, through intensive farming methods. Jays are responsible for eating probably just as many song bird nestlings as Magpies. Magpies own nestlings are predated upon by others.