
SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: Ducks swim at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: A duck swims at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: A duck swims at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: A duck swims at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: A duck swims at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: A view of Vrelo Bosne National park is seen during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: A duck swims at a lake in Vrelo Bosne National park during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )

SARAJEVO, BOSNIA AND HERZEGOVINA - APRIL 22: A view of Vrelo Bosne National park is seen during spring season in Sarajevo, Bosnia and Herzegovina on April 22, 2020. ( Mustafa Öztürk - Anadolu Agency )