Alaska field notes, v4437
Page 191
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
2 JP Nupus 1977 Phalaropus fulicarius GRID +, Carline Road, Barrow, Alaska 29 May ~2000 Dick Erickson reports 1 ♀ fulicarius this evening. At Kasook, Meade River, N. Slope Borough, Alaska Phalaropus in some areas abundantly, but w/ remarkably skewed sex ratio. We observed few males out of the 50+ ♀♀ in various areas, and estimate the s.r. to be at least 5:1 if not 8:1 ♀:♂. In one location w/ 2♂♂ and 2♀♀ we watched 2 ♂ fight for 3 consecutive minutes in one spot literally on top of a ♂. The ♂♂ were violently pummeling on another, grappling w/bills, butting w/ feet + wings falling down repeatedly. The ♂ crouched down so low under them it was often invisible on the tassocks. After having at it in one place they flew when the ♂♂'s stopped fighting + the ♂ left, followed by the ♀♀ who quickly began fighting again. Such frenzy I've never seen at Barrow. 9 June obviously paired fulicarius common now on hundred ponds. many more ♂♂ around them before, but still a ♂ biased sex ratio. Most appear to be using small ponds with any edges but they also can be seen along the larger lake edges. Much more numerous than Ph. lobatus Barrow, Alaska 7 June very few around, mainly ♀ biased sex ratio Atkasook, Meade River, N. Slope Borough 9 June phalaropus copulatory 10 June I have seen several instances of ♂ supplants even though it is obviously still paired, occurs when "intruder" flies in to local settled area. ♂ flies up + begins to fling its feet out, forcing the other bird to fly away, then it returns to perch mate, ♀ goes into a preening chorus, + finally becomes quiet. 14 June Barrow Began tracking fulicarius on Grid 4 this pm. Located 2 empty but in progress nest cups, one ♂ with complete clutch. a heavy (10+) of ♀♀ moving about in addition to at least 10 pairs. See tracking records.