A blue tit sits on a tree branch in a park in Minsk, Belarus February 22, 2019. Picture taken February 22, 2019. REUTERS/Vasily Fedosenko 

A great tit and a blue tit perch on a snow-covered bird feeder in Paris, February 8, 2018. REUTERS/Mal Langsdon 

A Blue Tit is seen in a garden in Vertou near Nantes, France, March 21, 2017. REUTERS/Stephane Mahe 

A Blue Tit is seen in a garden in Vertou near Nantes, France, March 21, 2017. REUTERS/Stephane Mahe 

Blue Tits sit on dried grass in a field near the village of Siabryn, some 80 km (50 miles) west of Minsk, January 5, 2009. The temperature in Belarus dropped to around -17 degrees Celsius (1 degree Fahrenheit) on Monday. REUTERS/Vasily Fedosenko (BELARUS) 

A Blue Tit sits on dried grass in a field near the village of Siabryn, some 80 km (50 miles) west of Minsk, January 5, 2009. The temperature in Belarus dropped to around -17 degrees Celsius (1 degree Fahrenheit) on Monday. REUTERS/Vasily Fedosenko (BELARUS) 

A Blue Tit (Parus caeruleus) sits on a wire fence in a garden near the village of Goroshki, some 30 km (18.6 miles) northwest of Minsk December 28, 2007. REUTERS/Vasily Fedosenko (BELARUS) 

A Blue Tit, tame enough to land on a woman's open palm, tries to choose between hazelnuts or sunflower seeds during a warm Spring day April 1 in the Slovenian capital's Tivoli park.
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