Hutovo Blato is a nature reserve and bird reserve located in Bosnia and Herzegovina. It is primarily composed of marshlands that were created by the underground aquifer system of the Krupa River. It is fed from the limestonemassif of Ostrvo that divides the Deransko Lake and Svitavsko Lake. The reserve is on the list of BirdLife International’s Important Bird Areas. It is the largest reserve of its kind in the region, in terms of both size and diversity. It is home to over 240 types of migratory birds and dozens that make their permanent home in the sub-Mediterranean wetlands surrounding Deransko Lake. In the migration season, tens of thousands of birds fill the lake and its surroundings.

Birds

Systematic list of registered species on 13 April 2001:

• Little grebe
• Great crested grebe
• Great cormorant
• Pygmy cormorant
• Little egret
• Grey heron
• Purple heron
• Gadwall
• Mallard
• Garganey
• Short-toed eagle
• Western marsh harrier
• Common buzzard
• Eurasian coot
• Ruff
• Wood sandpiper
• Black-headed gull
• Caspian gull
• Alpine swift
• Barn swallow
• White wagtail
• Common nightingale
• Cetti’s warbler
• Eastern subalpine warbler
• Blackcap
• Long-tailed tit
• Eurasian penduline tit
• Hooded crow
• House sparrow
• Common chaffinch
• European serin
• Cirl bunting
• Corn bunting