Some birds steal food from other birds to save themselves work, but kleptopredators take it one step further!

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Sources:
https://academic.oup.com/biolinnean/article-lookup/doi/10.1111/j.1095-8312.2008.00954.x
http://rsbl.royalsocietypublishing.org/content/13/11/20170447
http://onlinelibrary.wiley.com/doi/10.1111/ivb.12154/full
http://www.sciencedirect.com/science/article/pii/0040816684900053
https://www.nature.com/articles/s41598-017-08002-0
http://www.sciencedirect.com/science/article/pii/S0960982210007864
http://www.pnas.org/content/102/42/15155.short
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3368621/
https://ir.canterbury.ac.nz/bitstream/handle/10092/9753/12639965_mve_986_proof.pdf?sequence=1 http://www.pnas.org/content/106/46/19416.short
https://link.springer.com/article/10.1007/s10905-012-9338-4
https://www.researchgate.net/profile/Pablo_Alarcon5/publication/261502044_Diet_of_the_Neotropical_Cormorant_Phalacrocorax_brasilianus_in_a_Patagonian_Freshwater_Environment_Invaded_by_Exotic_Fish/links/02e7e53468e2283e87000000.pdf
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0161841

Images:
https://commons.wikimedia.org/wiki/File:Western_Gull_chasing_Elegant_Tern.jpg
https://commons.wikimedia.org/wiki/File:Cratena_peregrina_(Gmelin,_1791)_sur_Eudendrium_ramosum.jpg
https://commons.wikimedia.org/wiki/File:Eudendrium_ramosum_(Linnaeus,_1758).jpg
https://commons.wikimedia.org/wiki/File:Chromodoris_lochi_(AA3).jpg
https://commons.wikimedia.org/wiki/File:Tritoniopsis_elegans.jpg
https://commons.wikimedia.org/wiki/File:Glossodoris_atromarginata.jpg
https://commons.wikimedia.org/wiki/File:Elysia_viridis_(Montagu,_1804)_1.jpg
https://commons.wikimedia.org/wiki/File:Flickr_-_Lukjonis_-_Jumping_spider_-_Evarcha_arcuata_(Set_of_pictures)_(1).jpg
https://commons.wikimedia.org/wiki/File:Anopheles_mosquito_engorged_with_human_blood.jpg