A Boreal owl chick looks out of the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Scientist Jiri Sindelar holds two newly born Boreal owl chicks taken out from the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Scientist Jiri Sindelar holds a newly born Boreal owl chick with an identity ring outside the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

A Boreal owl chick looks out of the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Scientist Jiri Sindelar holds a Boreal owl chick outside the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Two Boreal owl chicks rest outside the "Smart Nest Box", which allows the study of birds by using mounted cameras, after being inspected in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Scientist Jiri Sindelar adjusts the "Smart Nest Box", which allows the study birds by using mounted cameras, on a tree in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Scientist Jiri Sindelar holds a Boreal owl chick outside the "Smart Nest Box", which allows the study birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Scientist Jiri Sindelar measures a newly born Boreal owl chick outside the "Smart Nest Box," which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Scientist Jiri Sindelar downloads data from the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

A Boreal owl sits on a tree branch outside the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Boreal owl chicks sit inside the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny

Scientist Jiri Sindelar checks a ring of a Boreal owl chick outside the "Smart Nest Box", which allows the study of birds by using mounted cameras, in a forest near the village of Mikulov, Czech Republic, June 18, 2016. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Czech Republic's Tomas Sivok clashes with Finland's goalkeeper Niki Maepaa (L) during their international friendly soccer match in Teplice, September 11, 2012. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT SOCCER)

Czech Republic's Tomas Sivok clashes with Finland's goalkeeper Niki Maepaa (L) as Finland's Jukka Raitala (R) looks on during their international friendly soccer match in Teplice, September 11, 2012. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

Czech Republic's Matej Vydra (R) fights for the ball with Finland's Daniel Sjolund during their international friendly soccer match in Teplice, September 11, 2012. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT SOCCER)

Finland's Niklas Moisander (R) and his team mate Jukka Raitala kick a ball to safety ahead of Czech Republic's Vaclav Kadlec (L) during their international friendly soccer match in Teplice, September 11, 2012. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT SOCCER)

Finland's Teemu Pukki shoots to score against Czech Republic's goalkeeper Jan Lastuvka during their international friendly soccer match in Teplice, September 11, 2012. Czech Michal Kadlec looks on it in right. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT SOCCER)

Czech Republic's Michal Kadlec (R) fights for the ball with Finland's Mika Vayrynen during their international friendly soccer match in Teplice, September 11, 2012. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT SOCCER)

A boy rides his scooter alongside a ballot box in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

A mother holds her child above a ballot box in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Chairman of the Czech Social Democratic Party (CSSD) Jiri Paroubek casts his vote in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Election committee members carry a portable ballot box into the prison of the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

An inmate enters a polling station in the prison of the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Chairman of the Czech Social Democratic Party (CSSD) Jiri Paroubek attends the country's general election in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Chairman of the Czech Social Democratic Party (CSSD) Jiri Paroubek attends the country's general election in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Chairman of the Czech Social Democratic Party (CSSD) Jiri Paroubek and his wife Petra leave the polling station after casting their votes in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Chairman of the Czech Social Democratic Party (CSSD) Jiri Paroubek casts his vote in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Chairman of the Czech Social Democratic Party (CSSD) Jiri Paroubek shows an envelope with his vote in the town of Teplice May 28, 2010. Czech voters wary of debt and angry about graft voted for a new government on Friday, with polls forecasting a tight result that could lead to protracted coalition talks and extend a decade of delays to reforms. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: POLITICS ELECTIONS)

Teplice's Pavel Verbir (R) reacts as Hapoel Tel-Aviv's players Valeed Badeer (L) and Vincent Eneyeama celebrate their victory after their UEFA Europa League play-off soccer match in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Hapoel Tel-Aviv's Gil Vermouth (L) is congratulated by his team mate Valeed Badeer after scoring against Teplice during their UEFA Europa League play-off soccer match in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Teplice's goalkeeper Tomas Grigar (L) fails to save a penalty kick from Hapoel Tel-Aviv's goalkeeper Vincent Enyeama during their UEFA Europa League play-off soccer match in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Teplice's Aidin Mahmutovic (L) challenges Hapoel Tel-Aviv's Avihay Yadin during their UEFA Europa League play-off soccer match in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORTS SOCCER)

Teplice's Vlastimil Vidlicka reacts after their UEFA Europa League play-off soccer match against Hapoel Tel-Aviv in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Teplice's Vlastimil Vidlicka (L) challenges Hapoel Tel-Aviv's Samuel Yeboah during their UEFA Europa League play-off soccer match in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Teplice's Stepan Vachousek (L) fights for the ball with Hapoel Tel-Aviv's Itay Shechter during their UEFA Europa League play-off soccer match in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Teplice's Jakub Mares (R) fights for the ball with Hapoel Tel Aviv's Avihai Yadin during their UEFA Europa League play-offs qualifying round soccer match in Teplice August 20, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Czech Republic's Jan Polak (L) fights for the ball with Belgium's Mousa Dembele during their friendly soccer match in Teplice August 12, 2009.
REUTERS/David W Cerny (CZECH REPUBLIC SPORTS SOCCER)

Belgium's Wesley Sonck reacts during their friendly soccer match against the Czech Republic in Teplice August 12, 2009. REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Czech Republic's Milan Baros celebrates after scoring against Belgium during their friendly soccer match in Teplice August 12, 2009.
REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Czech Republic's Milan Baros celebrates after scoring against Belgium during their friendly soccer match in Teplice August 12, 2009.
REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Czech Republic's Jan Polak (L) fights for the ball with Belgium's Mousa Dembele during their friendly soccer match in Teplice August 12, 2009.
REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Czech Republic's Milan Baros (R) is congratulated by his team mate Jaroslav Plasil as he celebrates after scoring against Belgium during their friendly soccer match in Teplice August 12, 2009.
REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Czech Republic's Michal Kadlec (R) fights for the ball with Belgium's Eden Hazard during their friendly soccer match in Teplice August 12, 2009.
REUTERS/David W Cerny (CZECH REPUBLIC SPORT SOCCER)

Czech Republic's David Jarolim (L) fights for the ball with Belgium's Steven Defour during their friendly soccer match in Teplice August 12, 2009.
REUTERS/David W Cerny (CZECH REPUBLIC SPORTS SOCCER)

Czech Republic's head coach Petr Rada reacts during their World Cup 2010 qualifying soccer match against Slovenia in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's Milan Baros (L) tries to score past Slovenia's goalkeeper Samir Handanovic during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's Milan Baros reacts during the World Cup 2010 qualifying soccer match against Slovenia in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's Vaclav Sverkos (L) and Slovenia's Bojan Jokic fight for the ball during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's Jaroslav Plasil (L) and Slovenia's Robert Koren fight for the ball during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's Libor Sionko celebrates after scoring against Slovenia during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's Jan Rajnoch (L) and Slovenia's Robert Koren fight for the ball during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's Marek Jankulovski (R) and Slovenia's Mirnes Sisic fight for the ball during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's David Jarolim (L) and Slovenia's Aleksander Radosavljevic fight for the ball during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's David Rozehnal (R) and Slovenia's Zlatko Dedic fight for the ball during their World Cup 2010 qualifying soccer match in Teplice October 15, 2008. REUTERS/David W Cerny (CZECH REPUBLIC)

Germany's President Horst Koehler (R) listens students during his walk in Teplice March 28, 2007. Koehler is on a one-day working visit to the Czech Republic. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's President Vaclav Klaus (L) welcomes his Germany's counterpart Horst Koehler before their meeting in Teplice March 28, 2007. Koehler is on a one-day working visit to the Czech Republic. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's President Vaclav Klaus (L) and his Germany's counterpart Horst Koehler walk during their meeting in Teplice March 28, 2007. Koehler is on a one-day working visit to the Czech Republic. REUTERS/David W Cerny (CZECH REPUBLIC)

Germany's President Horst Koehler (L) smiles as he talks with residents in Teplice March 28, 2007. Koehler is on a one-day working visit to the Czech Republic. REUTERS/David W Cerny (CZECH REPUBLIC)

Czech Republic's President Vaclav Klaus (R) and his Germany's counterpart Horst Koehler talk during their meeting in Teplice March 28, 2007. Koehler is on a one-day working visit to the Czech Republic. REUTERS/David W Cerny (CZECH REPUBLIC)