2, A, ADULT, ADULTS, ALONE, AMBIANCE, ANIMAL, ARDEA, ARDEIDAE, ARDEINAE, AREA, AS, ATMOSPHERE, AVES, BANK, BANKS, BIOSPHOTO, BIRD, CHILL, CHILLY, CICONIIFORMES, CINEREA, COLD, COLDS, CONCERN, DEVELOPMENT, DURING, EDGE, EDGES, ENUMERATION, ENVIRONMENT, EUROPE, EUROPEAN, FLAKE, FLAKES, FRESHWATER, FULL, GLOBAL, GREY, HAZARD, HERON, HERONS, ICE, ICY, IN, INDIVIDUAL, IUCN, IVAN, JANUARY, LC, LEAST, LENGTH, LIST, LONE, LONELY, LOW, LR, MATTER, METEOROLOGICAL, NATURAL, NOBODY, OF, ON, ONE, ONLY, OVERVIEW, OVERVIEWS, PHENOMENON, POSE, POSED, POSING, PRECIPITATION, PROFILE, RED, RISK, RIVE, SCANDINAVIA, SEASON, SEASONS, SETTLING, SETTLINGS, SHOT, SHOTS, SIDE, SIGHT, SIGHTS, SINGLE, SJOGREN, SNOW, SNOW-COVERED, SNOWFLAKE, SNOWFLAKES, SNOWSTORM, SNOWY, SOLID, SOLO, SPECIES, SPOT, STAGE, STANDING, STORM, STORMS, SUBSTANCE, SURFACE, SURFACES, SURFBIRD, SWEDEN, TAKEN, TEMPERATE, THE, THREATENED, UNION, VERTEBRATA, VIEW, VIEWS, WATER, WATERSURFACE, WATERSURFACES, WETLAND, WILD, WINTER, WINTERING, WITH,