Ingo Arndt / Reed Warbler (Acrocephalus scirpaceus) nest in Senckenberg Natural Hystory Collection Dresden, Germany.

Jeff Rotman / Man catching Alewives (Alosa pseudoharengus) with a hoop net during the Annual Spring Harvest, Dresden, Maine, USA. May. Model released.

Jeff Rotman / Alewives (Alosa pseudoharengus) caught in a hoop net during the Annual Spring Harvest, Dresden, Maine, USA. May. Model released.

Jeff Rotman / Man emptying Alewives (Alosa pseudoharengus) from a hoop net into crates during the Annual Spring Harvest, Dresden, Maine, USA. May. Model released.

Jeff Rotman / Woman placing Alewives (Alosa pseudoharengus) in a smoker, Dresden, Maine, USA. May. Model released.

Jeff Rotman / Woman hanging Alewives (Alosa pseudoharengus) on a stick for smoking, Dresden, Maine, USA. May. Model released.

Jeff Rotman / Man catching Alewives (Alosa pseudoharengus) with a hoop net during the Annual Spring Harvest, Dresden, Maine, USA. May. Model released.

Ingo Arndt / Steely-vented Hummingbird (Amazilia saucerrottei) nest in Senckenberg Natural History Collection, Dresden, Germany.

Ingo Arndt / Steely-vented Hummingbird (Amazilia saucerrottei) nest, Senckenberg Natural History Collection, Dresden, Germany

Ingo Arndt / Eurasian Wren (Troglodytes troglodytes) nest, Senckenberg Natural History Collection, Dresden, Germany

Ingo Arndt / Golden Oriole (Oriolus oriolus) nest, Senckenberg Natural History Collection, Dresden, Germany

Kerstin Hinze / Zwinger, Dresden, Saxony, Germany, June 2012