Australian Magpies - id request

General birdwatching discussion, help with bird identification, and all other things relating to wild birds and birding in NZ that don't fit in one of the other forums.
Jim Kirker
Posts: 116
Joined: Wed Jan 04, 2017 8:54 pm

Australian Magpies - id request

Postby Jim Kirker » Wed Oct 09, 2019 9:01 pm

These two were foraging on a footy field this evening. The one on the grass has a white nape and brown eyes, so an immature male ? The one that flew off and perched on a nearby fence has scalloped brown belly feathers and dark brown wings, so a juvenile sex indeterminate ? They both have a saddle, incomplete in what I think is the older bird.
P1120628 (4).JPG
Australian Magpie, Liston Park, Auckland 09/10/19
P1120628 (4).JPG (612.94 KiB) Viewed 237 times
P1120632 (3).JPG
Australian Magpie, Liston Park, Auckland 09/10/19
P1120632 (3).JPG (229.93 KiB) Viewed 237 times
Hypno
Posts: 54
Joined: Sat Mar 15, 2014 12:21 pm

Re: Australian Magpies - id request

Postby Hypno » Thu Oct 10, 2019 10:06 am

the one one the grass with a cream bill is adult male, juveniles have a black bill and grey breast. Perched bird looks a female Juvenile based on the grey side portion of the breast feathers i can see, hard to tell with out seeing the bill and breast fully.both may have some hybridization with back backed?

https://www.researchgate.net/figure/Dis ... _267230124
Jan
Posts: 1392
Joined: Fri Jul 03, 2009 10:43 am
Location: Christchurch

Re: Australian Magpies - id request

Postby Jan » Thu Oct 10, 2019 2:22 pm

The first one is a female I would say. Males have pure white backs.
Clinton9
Posts: 923
Joined: Sat Aug 07, 2010 10:22 pm

Re: Australian Magpies - id request

Postby Clinton9 » Fri Oct 11, 2019 6:42 pm

Larger White-backed magpies are common thought NZ, but smaller Black-backed magpies lives in east NZ.
They are very very wary & nervous and cannot be approached, expert breeding season when they become aggressive and attack humans and animals in defense of their chicks.

White-backed magpie are slightly bigger than feral pigeons.

Numbers and colors & pattern of immature plumages between first winter plumage and adult plumage, are unknown.
Adult Post breeding moult are complete, for 6 months from October to April, with all black flight feathers replaced once a year.

Not protected, due they had attacked native birds and blackbirds, and humans.

Lifespan: 20 years.

2-3 chicks per nest per year.

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