Tisza-tavi madárrezervátum, Bird reserve and Ramsar site at Tisza Lake, Hungary

The Tisza Lake Bird Reserve lies in the Tiszavalki basin in the northern part of Tisza Lake, a reservoir formed by the Kisköre water barrage. Its shallow, island-divided open water and reed beds give nesting sites and food to grey herons, night herons, squacco herons, little egrets, spoonbills, black kites, saker falcons, great egrets and cormorants.

The reservoir was created by the damming begun in 1973 at the Kisköre water barrage, originally planned in three stages; the final stage was abandoned, leaving large shallow areas and islands. These conditions attracted water birds, and the northern Tiszavalki basin became a strictly protected reserve, later included in the Ramsar list and part of the Hortobágy National Park UNESCO World Heritage site.

The reserve lies in the Tiszavalki basin and is part of the Hortobágy National Park, a UNESCO World Heritage site, and is listed under the Ramsar Convention. Boat and canoe tours start from Poroszló and Sarud, and bird-watching hides at key points let visitors watch species such as grey heron, night heron, squacco heron, little egret, spoonbill, black kite, saker falcon, great egret and cormorant.

To explore the reserve, visitors need to access it by boat from nearby launch points on the lake. Motorboats are restricted to outer areas, while paddle boats and rowboats can reach the quieter inner sections where birds rest and nest.

The reserve is home to large colonies of grey herons, spoonbills, and cormorants that build their nests in trees rising from the water. Seeing so many breeding birds gathered in one place is uncommon and makes this a remarkable spot for bird watching.