Pacific Black Duck Anas Superciliosa Species No.: 208 Band Size: 09 SS AM

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Pacific Black Duck Anas Superciliosa Species No.: 208 Band Size: 09 SS AM

Australian Bird Study Association Inc. – Bird in the Hand (Second Edition), published on www.absa.asn.au - July 2019 Pacific Black Duck Anas superciliosa Species No.: 208 Band size: 09 SS AM Morphometrics: Adult Male Adult Female Wing: 250 – 283 mm 230 – 265 mm Tail: 81.1 – 99. 0 mm 73.0 – 94.5 Bill: 48.5 – 57.4 mm 43.2 – 59.4 mm Tarsus: 40.9 – 49.2 mm 38.5 – 47.0 mm Weight: 900 – 1300 g 850 – 1200 g Ageing: Juveniles are capable of breeding at 6 months old; Adult breeding plumage is attained during the first year, so apart from juveniles (J) age all birds (except known age recaptures) as (1+). Sexing: Adult Male Adult Female Crown: black; black with variable streaking; Back, rump & black-brown, fringed dark less uniformly black than male; upper tail coverts: brown; Tertials: longest tertials are black-brown breeding - black-brown with varying light narrowly edged light brown on brown crescent-shaped streaks on outer web; outer webs or connected, varying in extent; non-breeding – all black; As stated above, non-breeding females can be distinguished by their all black tertials; Adult males do not have an eclipse plumage; Sex can also be determined by: • cloacal manipulation (see Kingsford R.T. (1988). Methods and Problems of Sexing and Ageing Australian Waterfowl. Corella 12 (4) 120 – 121); and • by call – males have drawn out hissy calls or grunts and whistles, whereas most female calls are based on the familiar duck quack; Incubation by female alone. Similar species: The introduced Northern Mallard Anas platyrhynchus hybridises with the Pacific Black Duck. The Mallard and the hybrids have orange-yellow legs & feet and males have curled central feathers & variable white feathers in the tail. The legs and feet of Pacific Black Duck are usually dusky brown, grey or tan to reddish-black and there is no white or curling in tail feathers. References: HANZAB 1; Drawings: J.N. Davies in HANZAB 1 - © BirdLife Australia Compiled by J.W. Hardy for the Australian Bird Study Association Inc. and reproduced with permission of BirdLife Australia .

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