Janett Eigendorf (r) and Claudia Bachmann from Cottbus Zoo carry a pair of ...

Claudia Bachmann from Cottbus Zoo holds a trumpeter swan in her arms. Cottb...

A pair of trumpeter swans swim in front of the pyramid on Lake Tumulus in B...

A pair of trumpeter swans courts after being relocated to Lake Tumulus in B...

A pair of trumpeter swans mating in front of the pyramid on Lake Tumulus in...

Claudia Bachmann and Michael Kuboth from Cottbus Zoo hold a pair of trumpet...

Claudia Bachmann and Michael Kuboth from Cottbus Zoo hold a pair of trumpet...