Eurema, mating

Sometimes it seems unfair, sometimes it seems like poetic justice for being too sure of yourself: you write something like ‘still no Eurema butterflies’ and take it public on your blog, then you walk outside and see not one but two Eurema butterflies, and they are busily making even more little yellow butterflies. Can’t complain too much, though – they waited for a photo:

small yellow Eurema butterflies mating

Eurema butterflies mating

They are noticeably smaller than the majority of our common butterflies (e.g. Crow, Chocolate Soldier or Eggfly) but larger than the little Zebra Blues which hang around the plumbago bushes.

These butterflies are difficult to identify down to species level and I have fallen into the habit of just thinking of them all as ‘Eurema’, which is the genus they belong to. I know they are either E. alitha or E. hecabe but the two species are very similar to each other and, to add to the difficulty, their coloration is seasonally variable. With those caveats, I will say I think these two are E. alitha, dry season form, with the male above.

The fact that they are dry-season form may be an indication of just how little rain we have been getting.

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What’s around – mid February

Green Katydid

Katydids have much longer antennae than grasshoppers. This nymph's antennae are about twice its body length.

Our Wet has been pretty half-hearted so far. We have had showers and storms but nothing like the widespread soaking rain that we expect.

If I had to summarise what’s happening now in our little world of insects, the key word would be ‘green.’ There has been enough rain to encourage all the plants to grow, and the plant-eaters – especially grasshoppers and hawkmoth caterpillars – are taking advantage of the abundant food. Not only that, most of them want to stay camouflaged and so they are as green as what they eat.

More systematically:

  • Grasshoppers: lots of young ones, plus some young Katydids (mentioned here because Orthoptera covers Grasshoppers, Crickets and Katydids).
  • Butterflies: Pale Triangles (some yellow form now as well as the blue variety); Common Eggfly and Blue-banded Eggfly, but all of them males; Migrants and Crows; passing Ulysses, always special; occasional Orchard Swallowtails and what looks like a caterpillar; a fair number of Hesperidae; still no Eurema or Junonia.
  • Moths: Lots of little grass moths; a few adult hawk moth sightings, and lots of their caterpillars munching their way through our Pentas.
  • Mantis: still a few Neomantis nymphs on the weed I found them on, but they seem to leave home as soon as they can fly.
  • Dragonflies: a few in the garden, lots more closer to permanent water.
  • Flies: lots of red-eyed blue blowflies (Calliphoridae), some Soldier Flies, Stilt Flies and little, long-legged, green flies (Dolichopodidae) but hardly any Hover-flies (Syrphidae). Mosquitoes are Diptera (flies) too, and they are making up for the shortfall in the numbers of their relatives.
  • Wasps and bees: a few active mud-daubers and paper wasps; not as many Ichneumonidae as there were a month ago; a few Resin bees and Blue-banded Amegilla bees.
  • Spiders: some Lynx and Jumping Spiders, and quite a lot of Silver Orb-weavers. A few adult St Andrew’s Cross spiders, and a lot more to come because I have seen hatchlings. Still no little spiky Austracantha; and still no big Golden Orb-weavers  although last year we had them from December through to June.
Jumping spider and grasshopper

This grasshopper was not well enough camouflaged and not quick enough, and the Jumping Spider got him.

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Merchants of Doubt

cover of Merchants of DoubtMerchants of Doubt by Naomi Oreskes and Erik M Conway (Bloomsbury, 2010)

Merchants of Doubt tells the story of ‘How a handful of scientists obscured the truth on issues from tobacco smoke to global warming,’ as its subtitle says. It is a very strange and disturbing story of collusion between scientists, science administrators, right-wing politicians and big business in pursuit of an agenda which was ostensibly libertarian but in fact unscrupulously pro-business. One of its strangest, saddest aspects is that their programme gradually became a broadside attack on all science.

Anyone with any interest in the politics and sociology of climate change soon becomes aware that there is a very vocal but very small group which denies the overwhelming expert evidence that climate change is real, that is happening now and that it is man-made. They are today’s merchants of doubt: Bolt, Carter and Plimer in Australia, and Monckton, Lindzen, the Pielkes (father and son), Curry, Spencer, Lomborg, Watts and a few others overseas, mostly in the US. Most of the scientists on that list are not climate scientists, and some of the most vocal deniers are not scientists at all.

Oreskes and Conway show how this situation developed from the US politics of the Cold War era. First, the hard-science establishment was identified with the war effort; second, its already-hawkish leaders were promoted into science policy-making; third, some of them convinced themselves that any regulation of the free market was equivalent to creeping communism; and fourth, industry tacticians began recruiting scientists willing to cast doubt on science which led to government policies which would cost them money.

The industries concerned were tobacco, agricultural and industrial chemicals (opposing bans on DDT and CFCs) and most recently fossil fuels – fighting, of course, the idea that global warming is a problem. In each case they funnelled money to scientists and opinion-makers through lobby groups, ‘philanthropic’ foundations and so on – bodies with names like ‘Heartland Institute,’ ‘Freedom of Expression Foundation’ and ‘Hudson Institute.’ Names are named and evidence is methodically documented.

The original merchants of doubt, Frederick Seitz, S. Fred Singer, William Nierenberg and Robert Jastrow, were all scientists but (to quote from the book’s introduction) ‘for more than twenty years, these men did almost no original scientific research on any of the issues on which they weighed in. … In fact, on every issue, they were on the wrong side of the scientific consensus. … [They] fought the scientific evidence and spread confusion on many of the most important issues of our time.’

Merchants of Doubt is peculiar in my life in that I commended it to others long before I read it myself. It emerged to great acclaim from people and publications I trusted, reviews showed that it told a very important story and Oreskes’ interviews convinced me it would be well told. It is pleasing to know now that I was right to recommend it and it has been satisfying to read the whole morbidly fascinating story at last.

More information:

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Hawk moths

Convolvulus hawkmoth, Agrius convolvuli

Convolvulus hawkmoth, Agrius convolvuli

Like the Rhinoceros beetle (previous post), hawk moths are wet-season visitors, with occasional strays turning up as late as the end of May and as early as the end of October. We get several species - Hypotion rosetta and some adults I haven’t identified such as this camouflaged brown one. They generally feed on the wing, like this one.

They often fly in around dusk so we don’t see them as often as we see their caterpillars, which spend all day eating their way through our Pentas plants and will do the same to Madonna lilies if given the chance. (We might like them a bit more if they liked the weeds, actually.) The caterpillars are large – here is one on my hand to give you an idea – and come in green, brown or black, often with eye-spots and usually with a horn on the tail end.

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