Massive Grackle birds flying free under the coniferous, autumn season, migratory birds

flying on trees coniferous inhabitant foliage autumn season autumn conifers foliage north america ornithology green leaves trees agricultural fiels neighbor northern habitant biodiversity open woodlands inhabitants marshes inhabitants song birds yellows and oranges north american specie grackles flight parks visitant forrest canadian breeding pan left movement flying free migration living on fields bird blackbird common grackle free and salvage eaters of insects migratory ballet animals wings spread noisy groups hunter of ants biology colectores grackles gang ballet