Thousands of geese flying above field and eating cereal

field agriculture bird migration flock rural feeding birds flight stubble field dry economy anser fabalis bean goose flock of birds anser albifrons hordes grain growing grey goose nutrition migrations gatherings of geese migration stop cultivation wheat abundance birds flock of geese getting down whitefronted goose migratory eaten grain rookery birds agriculture spring stubble feeding plowed field stopover anser fat depot congestion nature landfall migrating geese thousands geese myriad laughing goose harmful to farming landing sky animal