owl
---
https://openclipart.org/detail/17566/cartoon-owl
https://www.iconspng.com/image/111678/cartoon-owl
http://www.pd4pic.com/owl-animal-comic-bird-eyes-brown-cute.html
License: Public Domain CC0
https://creativecommons.org/publicdomain/zero/1.0/

(siehe auch https://openclipart.org/search/?query=lemmling)


tux
---
https://pixabay.com/de/pinguin-tier-vogel-tux-149035/
http://www.pd4pic.com/penguin-animal-bird-tux.html
License: Public Domain CC0
https://creativecommons.org/publicdomain/zero/1.0/

(siehe auch
 https://openclipart.org/search/?query=lemmling
 https://pixabay.com/de/photos/tux/)


hens, mountain
--------------
Wolfgang Kowarschick <kowa@hs-augsburg.de>
Copyright: 2016 - 2018
License:   CC-BY-NC-SA-4.0
https://creativecommons.org/licenses/by-nc-sa/4.0/

The files hens-70.png and hens-70.json
were generated from the source images by
means of TexturePacker (http://www.codeandweb.com/).