Migratory and resting birds
The bird migration is at its peak March-May and August-October. Both spring and autumn host hundreds of thousands of mainly wading birds on the island's waders. Ordinary grouse form the largest flocks, but Icelandic rye, beach damage, big spove, small spove, small copper snop, green, redbones, clydes and white cliches also appear in large numbers. It is not unusual to experience more than 20 different wading bird species in a single day. Geese include bramgots, grey goose, knuckle goose and short-beak goose as the most numerous. The number of geese is steadily increasing. In particular, there are many bramgæs primarily by Juvre, but also some bliss geese can be experienced. Pipe duck, mallard, crayruck, tipand and gravand are the most common duck species. Among the birds of prey there is often mountain watch, reed hawk, peregrine falcon and dwarf falcon and now also regular sea eagle.
Along the west coast of Rømø, you can experience large flocks of resting diving ducks (blackand, edbird), migratory or resting seagulls and terns, especially in autumn, and sometimes actual seabirds like sulins.
From the southern tip of the island, many migratory small birds and birds of prey can be observed in the autumn. Likewise, many small birds at the southern tip – at the Storms – screened before moving further south. Scrubs and shrubbery here are very nice places in autumn for small birds – also for specialties and rarities.
Large flocks of grey geese winter in mild winters on Rømø along with a large number of duckbirds. As something completely new, the number of resting bramgæs has increased significantly. More than 50,000 birds can be seen at the Rømø Dam. In winter you can also observe flocks of mountain larks, mountain irics and snow sparrows.