Penglihatan burung: Perbedaan antara revisi

Dalam bermigrasi, burung sedikit tergantung dengan medan magnet.<ref>{{cite journal|title=Night-vision brain area in migratory songbirds|journal=PNAS|year=2005|volume=102|pages=8339–8344|doi=10.1073/pnas.0409575102|author=Mouritsen, Henrik; Gesa Feenders, Miriam Liedvogel, Kazuhiro Wada, and Erich D. Jarvis|pmid=15928090|issue=23|pmc=1149410}}</ref> Burung menggerakkan kepalanya untuk mendeteksi arah medan magnet,<ref>{{cite journal|title=Migratory birds use head scans to detect the direction of the Earth's magnetic field|journal=Current Biology|volume=14|issue=21|pages= 1946–1949|last=Mouritsen|first=H.|year=2004|doi=10.1016/j.cub.2004.10.025|url=http://www.seaturtle.org/PDF/Mouritsen_2004_CurrBiol.pdf|pmid=15530397|last2=Feenders|first2=G|last3=Liedvogel|first3=M|last4=Kropp|first4=W}}</ref> dan penelitian yang dilakukan di [[sistem saraf]] burung menunjukkan bahwa burung dapat "melihat" medan magnet.<ref>{{cite journal|author=Heyers D, Manns M, Luksch H, Güntürkün O, Mouritsen H|year=2007|title=A Visual Pathway Links Brain Structures Active during Magnetic Compass Orientation in Migratory Birds|journal=PLoS ONE |volume=2 |issue=9 |page=e937 |doi=10.1371/journal.pone.0000937|pmid=17895978|pmc=1976598|editor1-last=Iwaniuk|editor1-first=Andrew}}</ref> Mata kanan burung migran mengandung protein fotorereseptiv yang disebut [[criptocrom]]. Cahaya merangsang molekul-molekul yang ada di dalam criptocrom untuk menghasilkan [[elektron]] bebas yang berinteraksi dengan medan magnet bumi, sehingga memberikan informasi tentang arah.<ref name= shanor>{{cite book| last = Shanor | first = Karen | coauthors=Kanwal, Jagmeet | title =Bats sing, mice giggle: revealing the secret lives of animals | year = 2009 | publisher = Icon Books | isbn =1-84831-071-4 |page = 25}} (Despite its title, this is written by professional scientists with many references)</ref><ref>

* {{cite book|last=Burton |first=Robert | title = Bird Behaviour |year= 1985|publisher=Granada Publishing |location=London |isbn=0-246-12440-7 |pages= }}

* {{cite book|last=Sinclair |first=Sandra | title = How Animals See: Other Visions of Our World |year= 1985|publisher=Croom Helm |location=Beckenham, Kent |isbn=0-7099-3336-3 |pages= }}