28782_1.jpg:
Photographer/User: Rudolphous
License: CC BY 2.0
License URL: https://creativecommons.org/licenses/by/2.0
Credit: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/dhobern/38807901210/">Chroicocephalus ridibundus</a>

28782_2.jpg:
Photographer/User: Lycaon
License: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0
Credit: <span class="int-own-work" lang="en">Own work</span>

28782_3.jpg:
Photographer/User: Lycaon
License: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0
Credit: <span class="int-own-work" lang="en">Own work</span>

28782_4.jpg:
Photographer/User: Ercé
License: CC BY-SA 4.0
License URL: https://creativecommons.org/licenses/by-sa/4.0
Credit: <span class="int-own-work" lang="en">Own work</span>

28782_5.jpg:
Photographer/User: Nikola Veljković
License: CC BY-SA 4.0
License URL: https://creativecommons.org/licenses/by-sa/4.0
Credit: <span class="int-own-work" lang="en">Own work</span>