Langholm lies in the middle of Lejre Vig. It is mostly grassy, but in places where Water Voles have scraped up mounds of loose soil there are clusters of annual and biennial plants.



The lovely Greater Musk Mallow is the most eye-catching, but there are other beautiful flowers, like Pansies.






On the northern end of the island there is a large block of wild asparagus. This is the only island where this is found and it has stood in the same place for at least 30 years. .



Langholm has the biggest Mute Swan colony in the fjord, with up to 150 nests. For many years this has been the object of intense study into swans’ breeding conditions. The island is also home to a large Herring Gull colony (about 100 nests) and a couple of good Common Gull and Black-headed Gull colonies. The fresh water species (Greylag Geese and Tufted Duck), which do not need reed beds, are also found here.



Like the nearby Hyldeholm, the island has been plagued by rats, which has been a catastrophe for the gulls and terns. One year there was a stoat on the island. It killed 35 mature Common Tern, 13 of which were ringed –enough to give a picture of the age profile of the breeding Common Tern. It later exterminated the island’s Water Vole population, which led to a drastic reduction in the number of annual and biennial plants. A striking example of how little it takes to upset the ecological balance on these isolated little biotopes.