Corcorax melanorhamphos

8 White-winged Chough at Watson, ACT

Corcorax melanorhamphos at Watson, ACT - 11 Jul 2019
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Identification history

Corcorax melanorhamphos 13 Aug 2019 natureguy
Corcorax melanorhamphos 12 Aug 2019 kdm

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User's notes

One Chough had white feathers interleaved with the usual black all over the body. Is this a moult?

2 comments

   13 Aug 2019
Cool. It would have to be genetic I think. I've not encountered or heard of choughs like this - might interest people if you wanted to share this to the COG chatline?
DonFletcher wrote:
   15 Aug 2019
Leucism (resulting in 'leucistic' animals) occurs infrequently throughout many vertebrates including humans (eg friends with a white spot in their dark hair). Its effect looks like a partial albinism. These individuals can be positively selected by breeders (eg think of piebald and skewbald horses) or nature (the white Bennett's wallabies on Maria Is) but more often white seems deleterious (eg the regularly reported white kangaroos around the ACT rarely seem to last). There are claims, e.g. by Jerry Olsen, ACT, that raptors target individuals in a group that look 'different', so if confirmed, such behaviour by predators would be expected to result in negative selection for leucism.

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Nearby sightings

Page 1 of 1 - image sightings only

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Cullen tenax (Tough Scurf-Pea) at Watson, ACT - 14 Jan 2022 by waltraud
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Syrphini sp. (tribe) (Unidentified syrphine hover fly) at Watson, ACT - 23 Aug 2019 by kdm
Smicrornis brevirostris (Weebill) at Watson, ACT - 9 Aug 2019 by kdm
Trombidiidae (family) (Red velvet mite) at Watson, ACT - 14 Apr 2018 by RobertD
Leucochrysum albicans subsp. tricolor (Hoary Sunray) at Watson, ACT - 30 Oct 2017 by AaronClausen
Xerochrysum viscosum (Sticky Everlasting) at Watson, ACT - 12 Dec 2016 by BethanyDunne
Orobanche minor (Broomrape) at Watson, ACT - 5 Dec 2016 by AaronClausen
Tricoryne elatior (Yellow Rush Lily) at Watson, ACT - 27 Nov 2015 by MAX
Chrysocephalum apiculatum (Common Everlasting) at Watson, ACT - 22 Nov 2015 by MAX

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