Free runners “3run” take advantage of O2's empty Slough HQ on the company's flexible working day on February 8, 2012 in Slough, England. (Photo by Ian Gavan/Getty Images for O2)

A model composes herself during the Ukrainian Fashion Week 2020-2021 at the Mystetskyi Arsenal National Art and Culture Museum Complex on February 4, 2020. (Photo by Irynka Hromotska/Radio Free Europe/Radio Liberty)

Team China performs during the team free routine artistic swimming competition at the 19th Asian Games in Hangzhou, China, Sunday, October 8, 2023. (Photo by Aaron Favila/AP Photo)

The blue-footed booby (Sula nebouxii) is a marine bird in the family Sulidae, which includes ten species of long-winged seabirds. Blue-footed boobies belong to the genus Sula, which comprises six species of boobies. It is easily recognizable by its distinctive bright blue feet, which is a sexually selected trait. Males display their feet in an elaborate mating ritual by lifting their feet up and down while strutting before the female.

A young Free Syrian Army fighter holds a rifle in Haresta neighbourhood of Damascus January 16, 2013. (Photo by Goran Tomasevic/Reuters)

Esther Abad free diving in Cenote Chukum, in the Yucatan peninsula in Mexico on June 13, 2022. (Photo by Wojciech Dopierala/Mercury Press)

Large trumpet vines spread across electrical lines next to a highway in Kinston, N.C., on June 23, 2014. (Photo by Janet S. Carter/Kinston Free Press via AP Photo)

China perform during the mixed team free preliminaries on day seven of the Doha 2024 World Aquatics Championships at Aspire Dome on February 8, 2024 in Doha, Qatar. (Photo by Clodagh Kilcoyne/Reuters)