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Today's Topics:
1. Re: Hollows vs built nests (calyptorhynchus)
2. Orange is the colour (Geoffrey Dabb)
----------------------------------------------------------------------
Message: 1
Date: Tue, 26 Oct 2021 12:35:08 +1100
From: calyptorhynchus <>
To:
Subject: Hollows vs built nests
Message-ID:
<CAO5cx3wTgW+s2Qcj_oDg=>
Content-Type: text/plain; charset="utf-8"
I once saw a female Galah seeming to egg on a male Galah to continue
attacking the bark of a tree near a hollow. It may be that it's just a beak
sharpening activity and males do it in a exaggerated way to display to
females.
The only other explanation I have heard is that they strip the bark around
the hollow mouth to make it slippery and difficult for possums and snakes
to approach the mouth of the hollow.
John L
On Tue, 26 Oct 2021 at 12:11, Dr David Rosalky <> wrote:
> I agree with you about the timescale. The birds would appear to be
> investing in their breeding success about ten years hence. They must have
> got real estate advice.
>
>
>
> David
>
>
>
> *From:* Philip Veerman <>
> *Sent:* Tuesday, 26 October, 2021 12:02 PM
> *To:* 'Dr David Rosalky' <>; 'COG bird list' <
> >
> *Subject:* RE: [Canberrabirds] Hollows vs built nests
>
>
>
> The one I saw a pair of galahs fly into one eucalypt tree, the second to
> arrive bit off a little branch about 15 cm long with several leaves. It
> walked along the branch to sit right beside the partner and did a lot of
> head bobbing. It then flew about 100 metres direct to another tree where
> there was a hollow spout. It appeared to try to push the little branch into
> the hole but was not successful and the branch fell down outside. The
> ?ringbark? idea you mention sounds to me like another one of those dopey
> nonsense suggestions that is an idea looking too hard to find a rationale.
> What is the time scale for that to work? Cockatoos are naturally chewers of
> branches anyway ? and houses for that matter.
>
>
>
> Philip
>
>
>
> *From:* Dr David Rosalky [
> <>]
> *Sent:* Tuesday, 26 October, 2021 11:52 AM
> *To:* 'Philip Veerman'; 'COG bird list'
> *Subject:* RE: [Canberrabirds] Hollows vs built nests
>
>
>
> Thanks Philip
>
>
>
> Yes, I looked at Joe?s book and at HANZAB. Lots of ?predominantly? and
> similar words but not definitive.
>
>
>
> I also saw a galah taking a spray of leaves into a nest hollow. HANZAB
> suggests more to do with preventing parasites than lining the nest. That
> pair was active this morning. One of them was chewing wood continuously
> for a long period. A local I was talking to said that the bird does this
> to ringbark the tree and thereby to induce greater hollowing of the nest
> space. Really?
>
>
>
> David
>
>
>
>
>
> *From:* Canberrabirds <> *On
> Behalf Of *Philip Veerman
> *Sent:* Tuesday, 26 October, 2021 11:21 AM
> *To:* 'COG bird list' <>
> *Subject:* Re: [Canberrabirds] Hollows vs built nests
>
>
>
> Joe Forshaw?s book does not appear to mention it, at least not in the
> introduction. Though he does mention Galahs using small leafy branches to
> line the nest hollow. (I happened to see this on Sunday morning.) Of
> peripheral relevance is that the lovebirds of Africa build a nest, as does
> this one (below extract from Wikipedia).
>
>
>
>
>
> The *monk parakeet* (*Myiopsitta monachus*), also known as the *Quaker
> parrot*, is a species of true parrot
> <
https://en.wikipedia.org/wiki/True_parrot> in the family Psittacidae
> <
https://en.wikipedia.org/wiki/Psittacidae>. It is a small, bright-green
> parrot <
https://en.wikipedia.org/wiki/Parrot> with a greyish breast and
> greenish-yellow abdomen. Its average lifespan is 20?30 years. It originates
> from the temperate to subtropical
> <
https://en.wikipedia.org/wiki/Subtropical> areas of Argentina
> <
https://en.wikipedia.org/wiki/Argentina> and the surrounding countries
> in South America <
https://en.wikipedia.org/wiki/South_America>.
>
>
>
> The monk parakeet is the only parrot that builds a stick nest
> <
https://en.wikipedia.org/wiki/Bird_nest>, in a tree or on a man-made
> structure, rather than using a hole in a tree. This gregarious
> <
https://en.wikipedia.org/wiki/Social_animal> species often breeds
> colonially, building a single large nest with separate entrances for each
> pair. In the wild, the colonies can become quite large, with pairs
> occupying separate "apartments" in nests that can reach the size of a small
> automobile <
https://en.wikipedia.org/wiki/Automobile>. These nests can
> attract many other tenants including birds of prey such as the spot-winged
> falconet <
https://en.wikipedia.org/wiki/Spot-winged_falconet> (*Spiziapteryx
> circumcincta*), ducks such as the yellow-billed teal
> <
https://en.wikipedia.org/wiki/Yellow-billed_teal> (*Anas flavirostris*),
> and even mammals <
https://en.wikipedia.org/wiki/Mammal>. Their five to 12
> white eggs hatch in about 24 days.
>
>
>
>
>
> *From:* Canberrabirds [
>
> <>] *On Behalf Of *Dr
> David Rosalky
> *Sent:* Monday, 25 October, 2021 10:38 PM
> *To:* COG bird list
> *Subject:* [Canberrabirds] Hollows vs built nests
>
>
>
> Do any Australian parrots or cockatoos build their own nest?
> --
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--
John Leonard
Canberra
Australia
www.jleonard.net
Make nature great again.
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Message: 2
Date: Tue, 26 Oct 2021 12:41:30 +1100
From: "Geoffrey Dabb" <>
To: "Canberrabirds" <>
Subject: Orange is the colour
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