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Crna Mlaka Ornithological Reserve
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The Crna Mlaka Ornithological Reserve is located in the Jastrebarsko plain, southwest of Zagreb, and stands as one of Croatia's most vital bird conservation areas. The reserve consists of an extensive network of fishponds and surrounding oak forests, covering an area of approximately 6.2 square kilometers. Created in the early 20th century for pisciculture, these water bodies quickly evolved into a crucial habitat for various water birds. Crna Mlaka is particularly noted as a nesting ground for the rare white-tailed eagle and black stork, as well as a rest stop for thousands of migratory birds during their spring and autumn journeys. Designated as a special reserve in 1980, it was added to the international Ramsar list in 1993. The site also features the historical Zwilling Castle, built in the early 1900s in a late-historical style.
- Location: Croatia
- Top sights: Dvorac Zwilling · Crna Mlaka - special ornithological reserve
- Nearby: Jastrebarsko (10 km)
Best time to visit & climate
The most pleasant time to visit is Jun–Aug.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 0 | 1 | 6 | 11 | 15 | 20 | 22 | 22 | 16 | 11 | 6 | 1 |
| Rain mm | 77 | 87 | 77 | 86 | 107 | 90 | 78 | 92 | 130 | 109 | 116 | 89 |
📋 Practical info
Best season
Spring and autumn are best for bird migration, when many waders and ducks stop over. Summer gives the breeding season of local species.
Best time of day
Early morning is good for birdwatching, when activity is at its peak. Late afternoon also often yields good sightings.
Etiquette
Stay on marked trails and do not disturb birds while nesting. Dogs are not allowed in the reserve, and noise should be kept low.
What to bring
Good binoculars and a spotting scope are essential for watching water birds. Rubber boots are recommended, as trails can be wet.
Getting there
The reserve is south of Zagreb and accessible by car via the A1 motorway. Signposts guide the way to the entrance.
What to expect
Birds cannot be forced - take your time and sit quietly by the ponds. Rare species often appear only after a longer wait.
Geography
Facts
- The area was officially designated as a special reserve in 1980.
- The total area of the reserve spans approximately 620 hectares.
- Crna Mlaka was added to the international Ramsar list in 1993.
- The reserve hosts more than 10 nesting pairs of white-tailed eagles.
- Over 230 different bird species have been recorded within the site.
- The Zwilling Castle was constructed on the estate around 1905.
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Notable places around
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Sights in the town Crna Mlaka Ornithological Reserve (2)
Sights nearby
Frequently asked questions
What makes Crna Mlaka special?
It is a significant ornithological reserve and an important wetland for migratory birds.
Is the reserve accessible to visitors?
Yes, but visitors often need to register in advance as it is partially privately owned.
Where is Crna Mlaka located?
Near Jastrebarsko, about 40 km southwest of Zagreb.
Which birds can be seen here?
Particularly herons, ducks, and the rare white-tailed eagle can be observed here.
Is the terrain accessible in winter?
Yes, but the paths can be very muddy, so sturdy, waterproof footwear is necessary.
Crna Mlaka Ornithological Reserve: where is it located?
Crna Mlaka Ornithological Reserve is located in Croatia.
Crna Mlaka Ornithological Reserve: what is there to see?
Highlights include Dvorac Zwilling, Crna Mlaka - special ornithological reserve.
Crna Mlaka Ornithological Reserve: when is the best time to visit?
The most pleasant time to visit is Jun, Aug.
Crna Mlaka Ornithological Reserve: why is it worth visiting?
The Crna Mlaka Ornithological Reserve is located in the Jastrebarsko plain, southwest of Zagreb, and stands as one of Croatia's most vital bird conservation areas.
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