Editing Gray whale (section)

=====Resident groups=====
[[Image:Eschrichtius robustus Nootka 1.jpg|thumb|A gray whale swims near surf on [[Nootka Island]] within residential range.]]
A population of about 200 gray whales stay along the eastern Pacific coast from Canada to California throughout the summer, not making the farther trip to Alaskan waters. This summer resident group is known as the Pacific Coast feeding group.<ref>{{cite web|title=Demographic distinctness of the Pacific Coast Feeding Group of Gray Whales (''Eschrictius robustus'')|author=Lang, A.|url=http://swfsc.noaa.gov/textblock.aspx?Division=PRD&ParentMenuId=229&id=16955|publisher=NOAA Fisheries Service, Protected Resource Division, Southwest Fisheries Science Center|date=January 19, 2011|access-date=2011-02-25}}</ref>

Any historical or current presence of similar groups of residents among the western population is currently unknown, however, whalers' logbooks and scientific observations indicate that possible year-round occurrences in Chinese waters and Yellow and Bohai basins were likely to be summering grounds.<ref name=GrayArea /><ref name=hkd2005 /> Some of the better documented historical catches show that it was common for whales to stay for months in enclosed waters elsewhere, with known records in the [[Seto Inland Sea]]<ref name="shikoku-np.co.jp" /> and the Gulf of Tosa. Former feeding areas were once spread over large portions on mid-Honshu to northern Hokkaido, and at least whales were recorded for majority of annual seasons including wintering periods at least along east coasts of [[Korean Peninsula]] and [[Yamaguchi Prefecture]].<ref name=hkd2005 /> Some recent observations indicate that historic presences of resident whales are possible: a group of two or three were observed feeding in [[Izu Ōshima]] in 1994 for almost a month,<ref name=Nakamura12>{{cite web|author=Suitube|year=2012|title=中村宏治 コククジラ撮影秘話！|url=https://www.youtube.com/watch?v=YrUcUmQSufE| archive-url=https://ghostarchive.org/varchive/youtube/20211118/YrUcUmQSufE| archive-date=2021-11-18 | url-status=live|publisher=Japan Underwater Films|page=[[YouTube]]|access-date=2015-01-07}}{{cbignore}}</ref> two single individuals stayed in [[Ise Bay]] for almost two months in the 1980s and in 2012, the first confirmed living individuals in Japanese [[EEZ]] in the Sea of Japan and the first of living cow-calf pairs since the end of whaling stayed for about three weeks on the coastline of [[Teradomari]] in 2014.<ref>{{cite web|url=http://www.shikoku-np.co.jp/national/science_environmental/photo.aspx?id=20120417000459&no=1|title=コククジラが三河湾を回遊／絶滅恐れ、３月に１頭|work=四国新聞社|access-date=14 May 2015}}</ref><ref>{{cite web |url=http://1topi.jp/curator/Makoto_Ninomiya/1303/05/104995 |archive-url=https://web.archive.org/web/20140424094446/http://1topi.jp/curator/Makoto_Ninomiya/1303/05/104995 |url-status=dead |archive-date=24 April 2014 |title=サービス終了のお知らせ |access-date=14 May 2015 }}</ref> One of the pair returned to the same coasts at the same time of the year in 2015 again.<ref name=Niigata2015 /> Reviewing on other cases on different locations among Japanese coasts and islands observed during 2015 indicate that spatial or seasonal residencies regardless of being temporal or permanental staying once occurred throughout many parts of Japan or on other coastal Asia.<ref name=2015Rematch />