Small Ant-blue

Acrodipsas myrmecophila


Small Ant-blue butterflies are indeed small.

Although when they fly in swarms like this one, in which there were of over a hundred individual males, they are spectacular.

This is the tree they were flying around, a small Blakeley's Red Gum sapling, with some dead wood lying around, in an open grassy woodland on the edge of the suburbs. The butterfly is a rare resident in the Canberra area, and is uncommon or very localised throughout its range from Victoria to southern Queensland.

Here a group of four adults (all male) have newly emerged from the ant nest they have developed within and overwintered as larvae. The ants are Coconut Ants Papyrius nitidus, and the butterfly larvae feed on their larvae. The ants build their nests in dead wood lying on the ground and in the base of the saplings.

Once their wings are fully extended they begin flying around the nest trees and perch on the branches and leaves, ever watching or smelling for females.

When fresh, their wings have a delicate fringe of scales.

When a few days old, the fringes are tattered and the wings themselves become chipped and ragged. The metallic blue of the bronze upperwing shows in this photo.

Two males perched on my watch as I was photographing the flock. They seldom sit with their wings open for more than a few seconds.

The females were scarcer and seemed to mate as soon as they could fly. The next time they became obvious was when they were seeking a crevice or shady piece of bark at the lower parts of a sapling to lay their eggs in.

I never saw a female sit with her wings open and this one only shows a glimpse of the bright metallic blue of her upperwing.

Once they have laid their eggs the females die. Or in this case are immediately killed and dismembered by the ants. How did the ants know to let her lay her eggs before attacking her. They were in attendance all the time she was laying. The blue of her wings is more easily seen now.

The males probably live for a week of so, competing to mate with a female, but they too can become prey. This one flew into a spider's web, she can be seen top right. Other males were caught by birds, such as Noisy Miners which had a nest in the ant-tree.

The whole flying season probably only lasts for a one or two weeks. Then once the adults have died, the species continues as several instar stages within the ant nest until the next generation emerges the following year. But what do the ants gain from the partnership? or are they simply conned by some pheromone emitted by the butterflies and larvae?

Keswick Island butterflies

I am not long back from a week on Keswick Island, one of the Cumberland group of islands in the southern part of the Whitsunday archipelago, off Mackay, Queensland, Australia. Only a week, but it has taken me about the same time to identify the butterflies I saw there. They were so easy to see that I saw most in one day, every day. I am now confident of about twenty species, thanks to help in the identification by Suzi Bond. There were about another ten species that I saw but could not grab a photograph of, and it is winter, or rather the dry season there. Here are some of my pick-of shots.



Blue Tiger Tirumala hamata, these were the most abundant species, clusters of them were roosting under branches when I first went out for a walk in the evening after unpacking the bags. I had gone out to listen and spotlight for wildlife, and this was so unexpected. Next morning there were clouds of them fluttering in the forest rides.



Varied Eggfly Hypolimas bolina - male. These butterflies were also abundant, although never in clouds. They seemed to be slow starters in the morning, much easier to photograph than the tigers. They have a lovely velvet sheen on their wings.



Clearwing Swallowtail  Cressida cressida - male, probably the second most common species. Many were freshly emerged with clean edged wings and lustrous shine. The glasswing occurs because there are no coloured scales on the translucent parts of their wings.

Clearwing Swallowtail - female. This lady still has soft wings, which are bent on the fore edges. She was fluttering low from nectar-bearing flower to the next, keen for a feed, energy and agility. Her second life had begun. What a gorgeous face.



Varied Eggfly - female. Not all the butterflies were fresh, this one was old, as can be seen by her tattered wings, very tattered wings. As this was in mid-dry season, I wonder when she emerged.



Orange Palm Dart Cephrenes augiades. Not all butterflies are large and dramatic. This species was abundant and well worth a close look. Its wingspan is only 40 mm, and see how it holds its wings, the fore-wings are half-erect. Its body was covered with hair-type cells, so it would endure the cooler nights quite easily. The temperature dropped to only a few degrees on several nights during my stay.



Purple Cerulean Jamides phaseli. We can't see it when the wings are held closed, but when this one flies it flashes a delightful purple-gloss upper-wing. Again, a lovely face, with marvelous antennae.



Orange Ringlet Hypocysta adiante. One of the trickier species to photograph. I could not capture one with its wings spread. These lived along the rough roadside vegetation, basking on the path, grasses or as here on stones. Both this and the next shot show how well they are camouflaged and disappear from our relatively poor sight when they land.



Orange Ringlet. This one was siphoning water from a mud-puddle. A favourite drinking method by butterflies. Meanwhile it is safely concealed by its resemblance to the background leaf.



Orange Bush-brown Mycalesus terminus. It is there, it is the same specimen as in the next image, so use that as a guide to its whereabouts in this picture. So many butterflies are difficult to see when they land. We tend to have to flush them first by accident, then watch until they land again. I memorise the exact surroundings, mark the spot and creep up slowly for a close view.



Orange Bush-brown. Now, can you see it. The shadow of the grass across the wing hides it from this angle, matching the dark fore-edge to the wings.



Monarch Danaus plexippus. It goes dark early in the tropics and by late afternoon most of the butterflies were slowing down and settling to roost as it grew dark. Each species have there own roosting sites, and this Monarch was amongst the Blue Tigers, back in the first roost I discovered. Thirty species in one day, perhaps more. Not a bad winter count. What is it like in summer.

Lesser Wanderer

A Lesser Wanderer basks in the sun while perched on a low twig. 

I was out at The Charcoal Tank Nature Reserve beside West Wyalong, New South Wales, over the weekend (on a bird-banding trip) and there were several of these Lesser Wanderer Danaus chrysippus butterflies flitting about. They all flew low over the ground, landing on the tips of sedges and shrubs in open glades to bask in the sun.

This was a male - the lower wing spots are large and main one has a white centre.
The upper wing spots are also large (previous image).

The species is common and widespread over most of Australia, but not so common in the south-east, so these were just about on the edge of their main range. As they are migratory, perhaps these specimens were pushing south in the height of summer. Or they could have been the offspring of butterflies that had flown south earlier in the year, as the females can lay several sets of eggs per annum.

The head and thorax have a marvelous chequered pattern

As I stalked ever closer and closer to them I gradually realised how boldly the head and  thorax are marked. The black and white pattern is stunning, and out of our usual human scale of perception..

There was a light wind, so the butterflies had to constantly flip their wings wide open,
over-extending them to compensate for the tricky sun-basking conditions