Geese fight during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. Every year in the last week of February, goose fights are held in the northern Serbian village of Mokrin. Left alone, male geese, or ganders, are unlikely to fight each other, hence why females are brought along for whose affections the ganders then fight until one or the other gives up. (Photo by Marko Djurica/Reuters)

Geese fight during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

Geese fight during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

A man walks with his geese during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

Geese fight during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

Geese fight during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

Geese fight during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

A man walks with his geese during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

Geese fight during the annual Geese Fight Day in the northern Serbian village of Mokrin, some 160km (100 miles) from Belgrade February 22, 2015. (Photo by Marko Djurica/Reuters)

A boy wearing a mask jumps over a fire during Bele Poklade carnival celebrations in the village of Lozovik, some 100 km (62 miles) from the capital Belgrade, February 22, 2015. Bele Poklade has its roots in old pagan customs and is marked annually seven weeks before Easter. Children walk through the village to collect eggs, and at the end they jump over a fire to banish evil demons. (Photo by Djordje Kojadinovic/Reuters)

A boy jumps over a fire during Bele Poklade carnival celebrations in the village of Lozovik, some 100 km (62 miles) from the capital Belgrade, February 22, 2015. (Photo by Djordje Kojadinovic/Reuters)

Children wearing masks take a rest in front of a house during Bele Poklade carnival celebrations in the village of Lozovik, some 100 km (62 miles) from the capital Belgrade, February 22, 2015. (Photo by Djordje Kojadinovic/Reuters)

A boy wearing a mask looks through a window during Bele Poklade carnival celebrations in the village of Lozovik, some 100 km (62 miles) from the capital Belgrade, February 22, 2015. (Photo by Djordje Kojadinovic/Reuters)

Children wearing masks walk along a road during Bele Poklade carnival celebrations in the village of Lozovik, some 100 km (62 miles) from the capital Belgrade, February 22, 2015. (Photo by Djordje Kojadinovic/Reuters)

A boy wearing a mask walks along a street during Bele Poklade carnival celebrations in the village of Lozovik, some 100 km (62 miles) from the capital Belgrade, February 22, 2015. (Photo by Djordje Kojadinovic/Reuters)

A boy wearing a mask stands in front of a house during Bele Poklade carnival celebrations in the village of Lozovik, some 100 km (62 miles) from the capital Belgrade, February 22, 2015. (Photo by Djordje Kojadinovic/Reuters)