Watching kids walk everywhere and point their phones around caching Pokemon Go virtual creatures I was just one of many wondering... couldn't this be used in ways to document biodiversity and wildlife... I sketched up my idea and explained it on a Citizen Science conference and a guy said: "it exist... several ones I think" The most well-known one is called "Seek"
The fieldfare is a strongly migratory bird breeding in Asia and Northern Europe. Heading south in the winter. And to the British isles