Week 26 = we’re half way through 2018 already!
Today I want to share some pictures of a Comma butterfly (Polygonia c-album), I’m not entirely sure but I think it’s a summer generation of sub-species (f.hutchinsoni).
In most languages this butterfly is called something with a reference to the white mark it has on its side, e.g. in English it’s Comma, in Spanish it’s C. Although in French it’s called Robert-le-Diable (“Robert the Devil”) because of its jagged wings. The scientific name also refers to the mark: “c” + “album” (which means white).
This butterfly has very good camouflage, both as a larva (mimicking bird droppings) and as an adult (mimicking a dead leaf).
PS. I’m off to Sicily so there won’t be any updates the next coming weeks!
Today I want to share FIVE FUN FACTS about dragonflies 🙂 A beautiful Common darter lady (Sympetrum striolatum) kindly agreed to demonstrate the facts in my pictures!
★ FACT 1: They were the first insects to inhabit this planet – 300 million years ago! In other words: they’ve had a looong time to perfect the art of flying and hunting.
★ FACT 2: They’re flat out terrifying if you’re a mosquito or other kind small bug, because they don’t simply chase down their prey but they snag them from the air with a calculated aerial ambush! Dragonflies can judge the speed and trajectory of a prey target, and they’re so skilled they have an impressive 95% success rate when hunting.
★ FACT3: They can fly in any direction, including sideways and backwards! (How cool is that!) Plus, they can hover in a single spot for a minute or more. But that’s not all. They’re also fast – some species reach almost 30 km/h (18 mph) – and one species (Globe skimmer) flies almost 18,000 km (11,000 miles) during migration which is the world’s longest insect migration. (Compare this with the famous Monarch butterfly migration of 2,500 miles.)
★ FACT 4: Both dragonflies and damselflies are in the order Odonata, which means “the toothed ones”. When hunting, they can catch the prey with their feet, tear off its wings with their sharp jaws (so the prey can’t escape) and scarf it down – all without needing to land. In short: Their ability to rip apart their prey takes their predatory prowess to another level.
Update: It should be noted that dragonflies don’t bite humans and they don’t have any stinger! i.e. they cause no harm to humans. (Thanks for pointing this out, Greta)
★ They have nearly 360 degrees vision! The enormous compound eyes contain 30,000 facets and they can see the world in colors we can’t even imagine. (In depth read here)
Update: It’s also worth mentioning that dragonflies have a significant, positive ecological impact. In its nymph stage, they eat harmful aquatic organisms and thus help keep our waters clean. The nymph can contribute to the ecosystem for up to five years before becoming a mature adult! As adults, they mainly help humans by eating mosquitoes and other insects that spread diseases such as malaria, yellow fever, anthrax, etc.
The Azure damselfly (Coenagrion puella) is quite common here in The Netherlands, and always a pleasure to see!
At first glance it could be a bit tricky to distinguish the Azure from a Common blue (Enallagma cyathigerum) damselfly, but if you look at the antehumeral stripe (that’s the long blue section on the thorax), the Azure’s blue stripe is narrower than the black stripe beneath it, and there’s an extra black line, a “spur” extending from the wing base towards the legs. The Common blue’s antehumreral stripe is broader than the black stripe beneath it and there’s no “spur” on the thorax.
Another thing to look at is the second segment of the males’ abdomen (just behind the thorax): both are blue but the Azure has a black U-shape and the common blue has a black mushroom-shaped mark.
And now I need your help! Please take a look at the second photo below, it’s not a great shot but I hope someone can help me identify this little damselfly.. I’m doubting if it’s either a Variable damselfly (Coenagrion pulchellum) or perhaps a female Azure in blue form. If you know which one it is, please leave a comment below!
The cardinal beetle is actually three different species of beetles. The most common one is the Red-headed cardinal (Pyrochroa serraticornis), which is an orange-red beetle with a – duh – read head. It’s about 2 cm long and easy to spot as it kind of glows (in the closeup shot below you can see the color is kind of red metallic). The Black-headed cardinal (Pyrochroa coccinea) has a – uhm – black head and is rarer, slightly larger and its body has a deeper blood-red color. The third kind is the Scarce cardinal (Schizotus pectinicornis), it also has a black head but is less than 1 cm long.
Cardinal beetles prey on other insects, while their bright red color prevents them from being targeted by other predators because red usually means toxic in the bug world.
If you see a beetle with red wings and black underside and wonder if it’s a cardinal beetle or not, the easiest tell is to look at the antennae: Cardinals have toothed antennae. It’s often confused with the Scarlet lily beetle, which is smaller and usually found eating lily leaves.
Two different takes on two different kinds of butterflies-
(1) Speckled Wood (Pararge aegeria), photographed today with Fuji 18-135 mm + Raynox 150. Goal was to get close to the butterfly and capture as much detail as possible. Picture not edited except it’s been slightly cropped.
(2) Green-veined white (Pieris napi), photographed with Pentacon 50 mm. Goal was to capture the moody light in the forest, not so much details in the butterfly (although enough to determine that it’s a female spring brood). Picture not edited or cropped.
Would you do me a favor and let me know which one you prefer? Not saying one is “better” than the other, but just curious to know your preference. You can use the voting buttons below! Thanks 🙂
Things aren’t always what they seem –
Cute little fallow deer (Dama dama) I saw in the Waterleidingduinen outside Amsterdam today 🙂
It’s wet and quite cold here in Amsterdam.. Here are some of the last mushrooms of this season, helicopter view 🙂 I especially like the turkey tail (Trametes versicolor) from this angle.
(Versicolor means ‘several colors’, which reliably describes this fungus that displays different colors.)
Things you need to take good mushroom pictures: A tripod, flash + reflector, a macro lens, and post-processing skills. Dutch photographer Daniel Laan is very good at all of this, check out his portfolio on 500px!
Unfortunately, I have none of this but that doesn’t stop me from photographing anyway 😉 Here are some pictures from today’s walk-
Small Mycena mushrooms on a sunny autumn day 🙂
Mycenas are hard to identify to species and some are distinguishable only by microscopic features such as the shape of the cystidia. Over 33 species are known to be bioluminescent, creating a glow known as foxfire (sometimes called “fairy fire”). I’ve never seen it in real life but you can read more about it in this article published by University of Chicago.