March is when the bird migration slowly begins. From March to April, and again in the autumn from late August to mid-October, you can experience Denmark's wildest natural phenomenon, "black sun”, when thousands of starlings fly together across the sky and cover the setting sun.
The scurvy grass plant, which the seafarers used to eat to avoid scurvy, can be picked and used in salads. The plant is rich in vitamin C and can be picked on Stormengene at Havneby.
The large heath burnings usually take place in March. At this time of year, the grass and the heather is dry enough to burn and the bird breeding season has not started yet.
In April the bird migration leads millions of birds over Rømø. From Rømø dyke it is often possible to see the first sandpipers arrive from West Africa and south-western Europe on their journey to their breeding grounds in Siberia and Greenland. The season is slowly getting started for windsurfers and sand yachting. The moor rose – pasque flower - is in flower. It is now time to gather porserakler for herb schnapps.
Birdsong is in full flourish in May, including the cuckoo. The red-backed shrike can be seen along the edge of the heath. Sea kemps grow on the salt meadows. It is the start of the kayaking season.
In June, the busy summer period commences on Rømø, tourists arrive on the island to enjoy the wide beaches and the beautiful countryside. Windsurfers and sand yachts can be seen on the beach. Fawn are born.
July is a busy month on Rømø, with huge numbers of people on the island. On a hot summer’s day there can be many thousands of guests on the wide beaches, but on foot or by bike you can always find a relatively undisturbed spot.
The rare alcon blue butterfly can be found in the heaths from mid-July, especially at places with bell heather. The rare bog orchid (Hammarbya paludosa) can also be seen in the moist areas of the dune heath. At the end of the month, crowberries, mountain cranberries and bog bilberries mature. Roe deer are in their mating season, and you can hear the call of the roebuck.
In August the sandpipers return from Siberia and Greenland with their grey offspring, and they fill up with food before flying on to West Africa and south-eastern Europe. They can often be seen from Rømø dyke. The heather flowers as a beautiful violet carpet. The bell heather flowers at more moist places. It is high season for berry pricking. Crowberries, mountain cranberries, and bog whortleberries are ready for picking and you can pick all that you can find as long as it is for your own consumption.
From the end of August to mid-October, and again in the spring, you can experience Denmark's wildest natural phenomenon - "black sun" - when several thousands of starlings fly together across the sky and cover the setting sun.