http://slugsite.us/bow/phil/hirundin.html
http://www.vibrantsea.net/hirundinina6_nudis3.html
http://rfbolland.com/okislugs/chelhiru.html
http://www.seaslugforum.net/showall/chelhiru
http://www.ne.jp/asahi/kappa-kuri/miyamoto/OSEHOO/umiushi32.html
http://www.sea-slug.com/species/umiusi101.htm
http://www.medslugs.de/E/Pac-W/Chelidonura_hirundinina/Selection.htm
http://www.umiushi.info/photo_species/photo_splist_eng.php?sopt=0&loc=0000
http://www.medslugs.de/E/Ind-E/Chelidonura_hirundinina/Selection.htm
http://www.medslugs.de/E/Atl-W/Chelidonura_hirundinina/Selection.htm
http://slugsite.us/bow/nudwk365.htm
http://slugsite.us/bow/bow365a.htm
http://slugsite.us/bow/bow365b.htm
http://slugsite.us/bow/bow365c.htm
http://www.medslugs.de/E/Pac-NW/Chelidonura_hirundinina/Selection.htm
http://www.jaxshells.org/anne1695.htm
http://www.underwaterkwaj.com/nudi/cephalaspideans/e115.htm
http://www.nudibranch.com.au/pages/7485b.htm
http://www.underwaterkwaj.com/nudi/hawaii/hc23.htm
http://www.seaslugsofhawaii.com/species/Chelidonura-hirundinina-a.html
http://www.Philippine-Sea-Slugs.com/Cephalaspidea/Chelidonura_hirundinina.htm
http://www.medslugs.de/E/Ind-SW/Chelidonura_hirundinina/Selection.htm
http://ianskipworth.com/suig/nudis2.html
http://www.nudipixel.net/species/chelidonura_hirundinina/
http://www.nudibranch.org/Sulawesi Sea Slugs/html/sss-sea-slugs.html
http://tahitinudi.jimdo.com/liste-des-espèces/chelidonura-hirundinina/
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=10
http://www.medslugs.de/E/Pac/Chelidonura_hirundinina/Selection.htm
http://www.medslugs.de/E/Pac-SW/Chelidonura_hirundinina/Selection.htm