فرس البحر. فرس البحر حيوان غريب الأطوار..الذكر هو الذي يحمل ويضع الصغار

"Taxonomy, habits and relationships of the sub-fossil Madagascan hippopotamuses Hippopotamus lemerlei and H "Childhood Trauma: Hungry Hungry Hippos"
"No rms, jungle vu: a new group of "landscape-immersion" zoo designers are trying to break down visitors' sense of security by reminding them that wild animals really are wild" "Mitochondrial DNA variation of the common hippopotamus: evidence for a recent population expansion"

Database entry includes a range map and justification for why this species is vulnerable.

حقائق فرس البحر: الموئل ، والسلوك ، والنظام الغذائي
The Journal of Applied Ecology
فرس النهر
"Faunal extinction in an island society: pygmy hippopotamus hunters of Cyprus"
فرس البحر البربوري
Isabella Hatkoff, Craig Hatkoff and Dr "A PCR-based method for sex identification in Hippopotamus amphibius"
"Endocrine patterns associated with reproduction in the Nile hippopotamus Hippopotamus amphibius as assessed by fecal progestagen analysis" 1995 : Note on the taxonomy of Pleistocene hippopotamuses

IUCN SSC Hippo Specialist Subgroup 2008.

3
حقائق فرس البحر: الموئل ، والسلوك ، والنظام الغذائي
"Undercover Hippo," Dangerous Encounters, National Geographic Channel, January 20, 2008
فـرس البحـر.. أسرار تُكتشـف
South African Journal of Wildlife Research
حقائق فرس البحر: الموئل ، والسلوك ، والنظام الغذائي
The Journal of the Acoustical Society of America
Catalogue of the Ungulate Mammals in the British Museum of Natural History Isotopes in Environmental Health Studies
"Fred Kroll, of Trouble and Hungry Hungry Hippos games, dead at 82" A Dictionary of Egyptian Gods and Goddesses

"Reports of carnivory by the common hippo Hippopotamus Amphibius".

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فوائد حصان البحر
Saikawa Y, Hashimoto K, Nakata M, Yoshihara M, Nagai K, Ida M, Komiya T 2004
معلومات عن فرس البحر
Retrieved on 14 August 2008
فرس النهر
"Analyses of mitochondrial genomes strongly support a hippopotamus-whale clade"