Models present creations for Etam during the 2017 Spring/Summer ready-to-wear collection fashion show, on September 27, 2016 in Paris, France. (Photo by Swan Gallet/WWD/Rex Features/Shutterstock)

Models dance during the presentation of Stella McCartney's Spring-Summer 2017 ready-to-wear fashion collection presented Monday, October 3, 2016 in Paris. (Photo by Francois Mori/AP Photo)

A model wears a creation for Miu Miu's Spring-Summer 2017 ready-to-wear fashion collection presented Wednesday, October 5, 2016 in Paris. (Photo by Francois Mori/AP Photo)

A model displays the collection of Italian luxury brand Diesel at its China's first flagship shop unveiling ceremony, at Henglong Plaza on November 26, 2005 in Shanghai, China. (Photo by China Photos/Getty Images)

A schoolgirl collects rubbish from Karachi's Clifton beach early morning April 22, 2013, during a cleaning campaign as part of the commemoration of Earth Day. (Photo by Akhtar Soomro/Reuters)

Sharon Beals is a San Francisco based photographer who has photographed nest and eggs specimens collected over the last two centuries at The California Academy of Sciences, The Museum of Vertebrate Zoology, and The Western Foundation of Vertebrate Zoology. While few nests are collected today, these nests and eggs are used for research, providing important information about their builder’s habitats, DNA, diseases and other survival issues.

A model is seen backstage before the Rochas Spring/Summer 2019 women's ready-to-wear collection show during Paris Fashion Week in Paris, France, September 26, 2018. (Photo by Gonzalo Fuentes/Reuters)

A model presents a creation from the collection Agua de Coco during the Sao Paulo Fashion Week, Brazil on October 26, 2018. (Photo by Nacho Doce/Reuters)