The lake is much appreciated among bird-watchers, and, being part of the Royal National City Park, also carefully monitored by several organizations, including the World Wide Fund for Nature.

In historical records documenting fishing grounds on Djurgården during the 17th century, the lodge is unintelligibly called Isbla.

[2] The large number of bird species have made the lake and the surrounding area popular among Stockholmers and tourists alike.

The lake area is mostly famous for its colony of more than 100 herons (all originating from birds that once escaped from the zoo at Skansen), but the surrounding walks in the forests are also known for the tawny owl found there.

[3] Bird species with an annual presences by the lake include: Great crested grebe, Slavonian grebe, black-headed gull, tufted duck, gadwall, northern shoveler, wigeon, Eurasian coot, common moorhen, common goldeneye, Ardea, greylag goose, Canada goose, barnacle goose, wood warbler, European pied flycatcher, thrush nightingale, Eurasian nuthatch, common treecreeper, European robin, hawfinch, willow warblers, whitethroat, common chaffinch, blue tit, European goldfinch, great spotted woodpecker, dunlin, greenshank, northern lapwing, ruff, and European green woodpecker.