bird 34,529, avian 28,653, background 11,173, sky 8,006, clouds 4,376, vehicle 3,835, light 3,444, window 3,381, cloud 2,568, train 1,930, lights 1,779, birds 1,628, electric 1,424, windows 1,096, windshield 423, track 318, wire 253, railroad 188, locomotive 162, tracks 127, trains 119, platform 110, rail 95, electric power 94, train station 58, windshield wipers 47, electric train 46, electric wire 46, electric locomotive 41, headlight 40, passenger train 40, flock 39, rails 39, pantograph 12, flocks 10, train trip 9, passenger car 9, railcar 5, station platform 2

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