Christmas Bells

Christmas Bells
Christmas Bells - Blandfordia nobilis
Showing posts with label Swift_Moths. Show all posts
Showing posts with label Swift_Moths. Show all posts

Wednesday, May 28, 2014

Swift Moths swarm to porch light, after first decent rain in a month

Tonight many Swift Moths (Oxycanus dirempta) swarmed to my porch light, after the first decent rain in a month.

This brightly coloured specimen liked me enough
to cling to my hand.
Their fondness for appearing in large numbers is reported in the literature for this species - as well as having been repeatedly commented upon in this Blog.
Ted Edwards has written a few notes about this, in the Atlas of Living Australia entry which is linked.

"..... when there are good autumn rains they emerge with the first rain after about 5 April in large numbers. So precisely is their emergence timed with rain that hundreds may be seen on that wet night and almost none before or after." Ted Edwards. CSIRO ANIC.

These are just a few of the moths which had been attracted to my front Porch light earlier on in the night,

You can see more photos of them at this album on my Facebook page.
https://www.facebook.com/media/set/?set=a.10152871644639829.1073741927.809229828&type=1&l=c279acbba3
The album is "Open", meaning you do not need to sign up for anything to view my images.

Friday, April 25, 2014

Some moths from April 2014

These moths may be seen via my Facebook album which is set to be viewed by anyone and everyone.
You do not need to be a Facebook member to see them.
https://www.facebook.com/media/set/?set=a.10152786509244829.1073741916.809229828&type=1&l=783b0147ad

This seems likely to be
Thalaina clara

One of the usual Swift Moths I get in Robertson
Oxycanus dirempta

Thursday, October 03, 2013

Aenetus eximia - Green Ghost Moth

I have written about a similar species twice, previously, because at first I did not realise the male and female were in the same species.
I originally mis-identified this as Aenetus scotti, but Dr. Dave Britton from Australian Museum has corrected me. Thanks Dave. I can now provide the correct name,and links.
Aenetus eximia
Australian Moths on Line has a set of specimens illustrated.
Don Herbison-Evans also has good information and photos on his site.

The related Swift Moths appear in early winter, but these ones seem to arrive in November or December. However, with the warm weather we have had this year, all my plants are coming into flower early. So that might be a trend.

Aenetus eximia
First time I have seen this species.
As one of my Facebook friends commented tonight,
"It looks like a Green Leaf, but with wings".
Aenetus eximia
The wing spots and dark blobs along the leading edge
of the forewings are matched on the ANIC dried specimen.
Dried specimens often lose some colour (the silver dots).
 
Head and small antennae of Aenetus eximia
The small antennae make me believe this is a female.

Showing the bright pink tonings of the hind-wings.
In this regard, it shows similarities to the Swift Moths
which are also in the same family Hepialidae
Aenetus eximia on my fly screen

Friday, May 10, 2013

Chrysalis of Swift Moth found protruding from ground

Today I found this empty "shell" (remains of the chrysalis) of a Swift Moth caterpillar's pupal stage, left empty when the adult moth emerged from the ground. I have seen such things before, (in other areas) left by Ghost Moths, which are even larger than this specimen.
This was the "rear end" of the Moth chrysalis.
This much was sticking out of the ground.


Scale shows it was slightly more than 70mm long.
The body end was quite firm still.
The "rear end" is fragile and weak.
The moth backs out of the case.

Given the number of Swift Moths I have seen recently I am going to assume that this belonged to Oxycanus dirempta.


The split in the shell is visible here.
That's where the Moth emerged.
"The Caterpillars of this species live in burrows they dig in the ground. Typically these are under Wattle bushes (Acacia species). They line their burrows with silk. They feed nocturnally, crawling out of their burrows to feed on leaves.


They pupate in their burrow. When the moth is ready to emerge, the pupa wriggles to the top of the burrow, and the empty skin is left poking half out of the burrow after the adult moth has departed."
Source: http://lepidoptera.butterflyhouse.com.au/hepi/dirempt.html

Here is one of these Head-banging Beasts.
At this time of year, they drive people mad in Robertson
desperately seeking lights, and sitting on windows.
The red eye is a reflection from the flash.
The other colours are normal.
Here is a slightly blurred image
But it shows the frantic wing beating
which makes them so noisy on our windows
It also shows the colour of the underside of all 4 wings.

Here are three different moths, showing the range of colours and patterns we get.
I have been advised (previously) that these are all representative of Oxycanus dirempta which is a "very variable species". So I was told.

My favourite pattern - with the strong white line

A fairly dull looking specimen
with a mix of checkerboard patterns, and
a broad light band across the foresings.
The hind wings are not visible when resting
in the "tent" position.
I really like the bright bronze colours
evident in many specimens like this one.


Wednesday, May 08, 2013

Swift Moths as "Head Bangers" on my Windows

This is a link to my Facebook Album of 3 photos of Swift Moths on my windows, with "crazy eyes" (courtesy of the Flash).
http://www.facebook.com/media/set/?set=a.10151895165964829.1073741830.809229828&type=1&l=1202cdb7c6

Judging by my previous response, anyone can now view these images, without being a member of Facebook.

DO NOT SIGN UP FOR FACEBOOK, JUST TO SEE THESE PHOTOS.
(This is my reaction against the dominant presence of Mr Mark Zuckerberg).

The same species of Moths at rest on my Front Porch a few nights ago (plus one which got "caught out" when the sun moved around, lighting it up, when the poor thing he had found a sheltered spot.

http://www.facebook.com/media/set/?set=a.10151889433079829.1073741828.809229828&type=1&l=9ce08b3cad

Tuesday, April 09, 2013

Swift Moths are back with cool moist weather.

Swift Moths seem to emerge and hang around the front porch of my cottage on cool, moist nights.
This has been observed in previous years, but as they have just started to appear in recent nights I thought I ought record the fact.

Swift Moth (Oxycanus dirempta)
Swift Moth (Oxycanus dirempta)

Swift Moth (Oxycanus dirempta)

Friday, May 25, 2012

Swarms of Swift Moths - on a wet night

On Thursday evening it had been raining in Robertson, and I had been away in Wollongong. When I returned I found my front verandah festooned with Swift Moths.
Swift Moths waiting for me to let them inside
Oxycanus dirempta

Even more Swift Moths on my screen door.
Oxycanus dirempta
I took a few images, and then came inside.
I opened my Computer and found an email from Martin Butterfield to say that he had "several hundred Swift Moths at our place tonight" (Martin is at Carwoola, NSW - somewhere in that district anyway, I believe).

My point is that my experience is not confined to Robertson. Cold weather and moderate rainfall (confirmed by this map) do seem to bring these Swift Moths out.

I have certainly noted their appearance being linked to wet nights previously - co-incidentally it was in the same season, (on 21 May - albeit in a previous year).
A mottled pattern on the wings of this one
Oxycanus dirempta

Strong silver lines on this Swift Moth
Oxycanus dirempta

A combined mottled pattern and vertical lines
Oxycanus dirempta.
Two contrasting wing patterns
on some of the Swift Moths.
Oxycanus dirempta

Several years ago I sent images to Donald Hobern who was at that stage in CSIRO, Canberra, at the Australian National Insect Collection.
Donald told me: "Just checked in ANIC. Based on the specimens there, Oxycanus australis is relatively consistent in appearance (like the image I forwarded earlier), whereas O. dirempta covers the diversity of all your photos - including some exceptionally close to the most highly patterned ones you show. I would therefore say that the likely identification is O. dirempta."


Thursday, April 12, 2012

Swift Moths arrive

As with many things this season, in Robertson, the Swift Moths have emerged early. No doubt in my mind it is the recent cold snap which has triggered them to emerge.

These two individuals are less clearly marked than many of the others I have seen and photographed previously. However, I have no clear basis on which to declare them to be anything other than the species previously identified as occurring in Robertson.Oxycanus dirempta 

Oxycanus dirempta

This one snuck in past the insect screen
Oxycanus dirempta

Eyes and antennae of
Oxycanus dirempta

Hind wings and abdomen of
Oxycanus dirempta
No doubt this is just an early showing for these moths which frequently beat themselves against my winds, especially on cold wet nights. Tonight has been dry, not wet.

Tuesday, June 22, 2010

The Eyes and Antennae of the Moth

These are not new photos. I took them in mid May, but since then I have posted about the birds of West Wyalong and other things, and I realised tonight that I had skipped over posting these images.
Silly Me!

Here is a Swift Moth (Oxycanus dirempta) which was quite passive, early one cool evening., last month. The eyes are reflecting the flash of my camera.
Here it is patiently sitting on my finger.
Note the hairy legs, and the huge compound eyes.
Interesting patches of mauve colour too.
(Click to enlarge the image.)
And now for the "Pièce de résistance".
The face of the Moth, with antennae fully extended.
(Click to view larger image)
Note especially the minute tips of the small branches on the antennae.
What looks like a "haze" around the antennae
is actually these tiny sense organs, virtually touching eachother.
This moth is almost certainly a male, with antennae set to track down a female. "In moths, males frequently have more feathery antennae than females, for detecting the female pheromones at a distance." (Source Wikipedia - lepidoptera - communication)

Not only are the antennae set with obvious, but tiny branches, ("plumose antennae" or "feathery antennae") but at the ends of each "branch" there are minute "feelers" which are virtually microscopic (sensilla)***. Their purpose is to detect the sex scent (pheromone) of the female. And they are extraordinarily good at it.
  • "Pheromones are odors that are used for communication. A female moth may release a pheromone that can entice a male moth that is several kilometers away."
It makes one realise that Moths ought be employed by French Parfumiers to design their next range of scents, for we humans are mere amateurs at this "scent" business.

*** Sensilla: "The number of multiporous hairs is usually large, since the greater the number, the greater the chance that molecules in low concentrations in the air or water will make contact with a sensillum. In insects the length or complexity of the antennae is a reflection of the numbers of multiporous sensilla. In insects requiring increased sensitivity, the antennae are branched, providing a larger surface area on which more sensilla can be accommodated" Encyclopaedia Britannica (web version).



Saturday, June 19, 2010

The Moth and Me #12

I confess to having not even been aware of this particular Blogging Carnival "The Moth and Me", although I am aware of the fine work of some of the Nature Bloggers who are participating, especially Seabrooke Leckie who writes "The Marvelous in Nature".

Anyway, over at "The Skeptical Moth" Chris Grinter has just published "The Moth and Me #12".

I was totally taken by surprise when Chris asked me if he could include my "Moth Art" piece in this series.

It turns out Chris has a fascination for Hepalidae moths - what we generally call "Swift Moths" (for reasons which still elude me).

The particular moth from which I took the design for my "Moth Art"
is Oxycanus dirempta (thanks to Donald Hobern for the ID).
Here it is viewed more naturally,
hanging off the eaves of my deck awning.
I get many of these moths here, and so I regularly post about them, especially when they are beating their huge wings against my windows on cold, damp nights. The other reason they appear is because they are the main host species in the local rainforest to the truly bizarre Fungus Cordyceps gunni.

Sunday, June 06, 2010

Moth Art

I have been fascinated with the natural beauty (subtle beauty) of the Swift Moths which have been coming to my lights this cool wet autumn and winter season.

This one in particular really struck me with its patterns, almost like Egyptian hieroglyphics to my eyes.I showed this Moth image to my friend Steve, who has been coaching me in the techniques of Photoshop recently, and he showed me how to try to create a "wallpaper design" from the Moth's wing pattern. That is what I have done here.
Having done that, Steve then showed me how to alter the colour balance and to experiment with different lighting effects.

Some were positively weird, but strikingly reminiscent of Aboriginal Art designs and colours.

However, for tonight's posting I have selected two modest variations on the theme.

One reminds me of some pink and caramel lollies I used get as a child.
Ironically, when I went looking for an image of such a "Lolly" I came across yet another natural design in similar colours - a "Pink Panther Caramel Albino Viper". Too weird to be true? Nope. Have a look.

This image is adjusted to bring out the natural beauty of the grey tones in the pattern. Shades of a pale-coloured Tortoiseshell Cat, don't you think?
Nature continues to play with variations on a theme, and we are programmed to see beauty in her variations.

Sunday, June 14, 2009

Sunset and moths

Yesterday afternoon, while I was working on the computer, a friend rang me to say there was a terrific sunset outside.Normally I see the glow of such events in the late afternoon sky. But with the sun moving well around to the west (not south-west) and my study window facing east, I had not noticed the glow.I rushed out, and knowing how quickly sunsets fade, I grabbed the camera and took 3 quick shots. Thanks to Peter for letting me know.
Later on, there were several species of Moths around - just quietly sitting on the wall of my front porch. None of that crazy buzzing around, as other moths tend to do, in autumn. This is a mid-sized moth, (about an inch long), with shallow "tent" habit of folding its wings. The wings themselves are grey, camouflaged, and very finely fringed at the lower edge. It is not a heavy bodied moth, as, for example, "bogong moths" are. The legs are not hairy, and have some of those very long spikes along them. Contrast that with the very hairy Swift Moth below,

See the fine fringes on the lower edges of the wings.
This one looks to me to bew very similar to Donald Hobern's image of Heteromicta pachytera.
I have no information on this moth, other than that they are in the Pyralidae (or Crambidae) which group are said to be "concealed feeders" - i.e, they hide inside the substance on which they are feeding. As a group, they are referred to as "Webworms, Meal, Flour, & Frass Moths".
I have not seen Swift Moths for more than two weeks. I was starting to believe they only came out in the rain, but last night, there was no rain. There were three of these moths. Two different individuals here. Note the very finely haired legs, and the large antennae, and the thick coating of "fur" over the body (behind the head).
See from the side, you can recognise this moth as one of the Swift Moths which were around several weeks ago. Those Swift Moths were identified by Donald Hobern as Oxycanus dirempta. By local standards, these are very large moths. They sit with their wings in a very steep "tent" formation.

As one of the dominant local plants is the Blackwood Wattle, these moths would appear to have plenty of food for their caterpillars, which burrow into the ground, to feed on the roots of Acacia plants (trees). They are also likely to be the "host" species of caterpillar which gets invaded by Fungus spores, which develop in the "Cordyceps" fungus, which is quite common in this area. If you go to that linked post, you will see "mummified" caterpillars which have large fungi growing out of their now mummified bodies - once the caterpillar has been "consumed" by the invasive hyphae (roots) of the fungus. The caterpillars are typically longer than my fingers. The fungus then is about the size and shape of a cigar.
Another of the weird and wonderful aspects of the Nature of Robertson.

Thursday, May 21, 2009

Swift Moths love the cold, wet weather

I have some difficulty in identifying these Swift Moths which have been coming to my front porch in the last week, of cool, wet weather. Any help in identifying these Moths would be appreciated. You can see in this image that there is considerable variation in size and colour markings of these moths, yet I assume they are the same species.
I was originally inclined towards the species known as Abantiades hyalinatus (HEPIALIDAE) until I saw the images on Donald Hobern's Flickr Gallery of moths, which clearly showed a violet colour to the hindwings and the upper part of the body. Also his specimens were recorded in January.
My specimens show a deep russet colour, but not purple
on the hind wings, and the body brown.
This was taken at 1/500th of a second, but still the image is blurred
showing how fast these Moths flap.

However, there is another likely candidate: Elhamma australasiae (HEPIALIDAE) . Don Herbison -Evans' encyclopaedic website on Australian Moths says: "The earliest adults appear in January, but they are most common in March and usually disappear by April."
As these moths have just appeared in Robertson, in the last week, when it has been cold and wet, the timing of Elhamma australasiae, as reported, hardly fits. I have written about these Moths previously, on 2 June 2008 (when it was cold and wet); and before that, on 27 May 2008
So, perhaps it is Oxycanus dirempta (HEPIALIDAE). At least Donald Hobern's images of this species are all recorded in May.
What troubles me is the variability of these moths - not just in my images, but in the available images on other galleries and websites.
Here is a handsomely marked specimen,
with a clear wing stripe.
Long antennae are also evident.
Here is a much redder specimen
with spots on the wings, not the clear wing flash
And a really dark specimen
with wing blotches, not white spots nor wing flash
Here is a very pale specimen, viewed "head on". It does look very similar to this specimen of Donald's Elhamma australasiae, so I am totally confused.I took this image and marked eight different moths
around my front porch at the one time.
I must admit to an assumption that these are all the same species - simply based upon the similarity of habit and timing of their appearance.
As I said at the beginning, any help in identifying these Moths would be appreciated.

Edit:

Donald Hobern came through with an ID - many thanks.
He said they "all look good for Oxycanus dirempta".
That's great.
Thanks Donald

Denis