A flock of starlings flies over Lake Leman on an autumn morning in the Lavaux near Grandvaux, Switzerland October 20, 2016. (Photo by Denis Balibouse/Reuters)
A flock of starlings is seen as they perform their traditional dance fly before landing to sleep during the sunset near the southern Arab Israeli city of Rahat, in the northern Israeli Negev desert, on February 2, 2015. (Photo by Menahem Kahana/AFP Photo)
These greenfinches go head to head in what appears to be a heroic fight or a playfull moment together, inspiration for a new version of “Angry Birds”, in Trezzo Sull'Adda, Italy in March 2013. (Photo by Marco Redaelli/IMP/AbacaPress.com)
These pictures show a rather annoying crow irritating an eagle. The crow tirelessly circles the bird of prey and repeatedly lands on his head – much to the crows displeasure. The encounter was spotted by Greaves Henriksen in Tamilnadu, India. The 52-year-old amateur photographer believes the eagle was sitting close to a nest, which the crow was trying to defend. Here: A crow lands on the eagles head much to the eagles displeasure. (Photo by Greaves B. Henriksen/Caters News Agency)
Hanging bird cages are displayed on poles during a bird-singing contest in the Rueso district in Thailand's southern province of Narathiwat on March 23, 2014. Hundreds of bird owners from Thailand, Malaysia and Singapore took part in the traditional contest held every year. (Photo by Madaree Tohlala/AFP Photo)
The Inca Tern is a seabird in the family Sternidae. It is the only member of the genus Larosterna. This uniquely plumaged bird breeds on the coasts of Peru and Chile, and is restricted to the Humboldt current. It can be identified by its dark grey body, white moustache on the both sides of its head, and red-orange beak and feet.