I went for a prowl around my garden on Friday morning, camera in hand, to see what bugs were around. My intention was to take photos of everything, whether I already had photos of it or not, as a way of documenting (and reminding myself) what is active at this change-of-season time.
In the event I missed a few on purpose and a few because they were too quick for me but ended up with presentable shots of 25 species. I uploaded them all to Flickr and they can be viewed as a slideshow here (if it doesn’t work for you, click here to go straight to Flickr). For information about them, enter full-screen mode and click “show info”, or click on the photo to go to the Flickr page (new window).
What did I miss?
I saw many of the butterflies I mentioned in my previous post but didn’t bother chasing them;
Green ants (Oecophylla smaragdina) are a big feature of life in North Queensland. A lot of people dislike them for the very good reason that they sting but I don’t mind that too much because they are, after all, only defending themselves and they are fascinating to observe. I particularly admire the way they co-operate to make their nests.
They are among the many species of ant which have an amicable relationship with mealybugs. I don’t like mealybugs (Hemiptera, Pseudococcidae) as much as I like the ants, to be honest. Yes, I know mealybugs are only doing their best to survive, just like every other living creature, but they don’t do anything interesting and they do damage the plants they live on.
Mealybugs are small insects covered with a white mealy coating; some have white hairs attached to their bodies. The bugs feed by sucking on the plant juices. Mealybugs excrete a sticky substance called honey dew which ants like to feed on. The honeydew also provides a perfect medium for sooty mould growth. Mild temperatures and high humidity are perfect conditions for mealybugs to breed as eggs hatch every 2-3 weeks. Prolonged hot weather reduces numbers. Heavy infestations can occur on citrus trees, daphne, and other ornamental plants. Orchids and ferns, especially in shadehouses, can also become infested.
I started my monthly survey a couple of days ago by mentioning that it was raining …
According to the BoM, Townsville Airport had 36 mm from 9.00 a.m. Thurs to 9.00 a.m. Friday and 91 mm from then to Saturday morning. It was patchy, though, with bands of rain coming through, and we measured 125 mm here from Friday morning to Saturday morning. That turned the bottom of our yard (near the bananas, which love water) into a floodway. Genuine Wet-season rain!
It has prompted a couple of colonies of small ants to head for higher ground – more than a couple, I’m sure, but those I saw were both on my window-sill. One trail was outside the window and the other emerged from under the sill inside the room, and went up and over it to points unknown. The ants in both trails were so small that I couldn’t see they were different species until I saw my photos on screen.
Not all of them were carrying eggs or larvae. Some were returning for a second load, while others were apparently just moving with the crowd.
Ants of the other species, coming from inside the wall, are more uniformly brown and I think they were a little smaller, though it’s hard to pick the difference between 2.5mm and 2mm when they are all moving as fast as they can.
Seeing ants heading for high ground is a classic warning of more rain to come, of course. The BoM agrees: the Low in the Gulf is expected to become a weak cyclone in a day or so and funnel a lot more rain our way. But the Dove Orchids didn’t flower early last week to warn us, as they are supposed to … I’m losing faith in their reliability, I’m afraid. Or maybe they just can’t react to changes in humidity when the average is 99%.
We don’t appreciate those which would like to suck our blood (mosquitoes are a pain), but the others are welcome enough. The dragonfly above was larger and more handsome than most and didn’t mind posing for a series of photographs, although I do think he has been unduly influenced by the trend for picking grimy industrial backdrops for fashion shoots. I mean, really, there are more attractive settings than the scrap timber stored under the house.
This tiny moth, about 7 mm long, is a more typical guest, flying into the house and landing on my desk. A look at my Flickr photos reveals the bizarre moth-fly (a fly that looks like a moth, not vice-versa) on the same background a couple of months ago and this beautiful olive-green moth on the wall nearby. If I left the windows wide open and the lights on, I could have hundreds like this instead of only tens.
Just now, flying ants are common. As I said about the Green-ant queen, warmth and moisture induce the emergence of swarms of winged ants on their way (they hope) to breed and set up new colonies. The one below failed spectacularly, coming to rest on … my mouse.