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Vejlerne: bitterns, cranes and Northern Europe's largest reedbeds

Eurasian bittern flying low over reeds
Eurasian bittern. Photo: Charles J. Sharp, CC BY-SA 4.0

Bittern (over half of Denmark's), spotted crake, water rail, bearded reedling, marsh harrier, cranes, black tern, avocet, greylag (1,000+ pairs), whooper swans in winter. Vejlerne, Hanherred (North Jutland) — Aage V. Jensen Naturfond, Denmark.

Best time: 20 Apr – 5 Jun (April to June). Where: Naturcenter Vejlerne, Bygholm dæmning, Kraptårnet / Han Vejle, Kogleakssøen tower (west Vejlerne) (Denmark). Time of day: Bitterns and cranes from an hour before sunrise to 2 h after.

Open it in the interactive calendarSunrise and sunset listening times for the day you pick, and the map.

When is the best time?

Peak: 20 Apr – 5 Jun. 20 April to early June (booming bitterns, crakes, black terns arriving)

Active from 15 Mar to 15 Jul (March to July) in a typical year.

Time of day

Bitterns and cranes from an hour before sunrise to 2 h after; bittern, spotted crake and water rail again from sunset into the night, legally from the dyke road.

What will you hear?

Bittern booming from several directions at once, spotted crake whiplashes, water rail squeals, cranes trumpeting at dawn, bearded reedlings pinging, greylag families, black terns over the lagoons; wind in 8 km of reed.

Binoculars?

Binoculars helpful. Bitterns and crakes are heard from the dyke road; binoculars from the hides and towers for cranes and harriers over the reed.

Where to go

How to go on your own, and what it costs

Bygholm dyke: drive Route 11 to the Naturcenter Vejlerne and the five car parks along the dyke road — hides and towers are free and the dyke road is open at all hours; Kraptårnet and Kogleakssøen towers from their car parks. No entering the reed.

Cost: Free.

Field-recording notes

The reserve is closed except for the towers, hides and public roads — but the Bygholm dyke road and the main road cross right through the reed, so you can record bittern and crakes from the roadside at night legally. Traffic on route 11 (Aggersund–Thisted) is light at night but present; the Bygholm dyke itself is a dead-end with none. Wind from the Limfjord is the enemy — the reed becomes white noise above Beaufort 4. No boats, no drones, no entering reed (Aage V. Jensen Naturfond rules).

Sources

Similar spectacles

More: all spectacles in Denmark · cranes · dawn choruses · Denmark in April · Denmark in May · Denmark in June