Showing posts with label Hummingbird Clearwing. Show all posts
Showing posts with label Hummingbird Clearwing. Show all posts

Tuesday, July 30, 2013

Always Look Twice ...

... look a little closer at that dead (or alive!) "leaf" or "twig", look under leaves and flowers, and take the time to turn rocks and logs over. Hold these thoughts on a nature hike, otherwise it's easy to miss out on the really interesting, captivating and ofttimes amusing things going on in the wonderful world of nature.

Sometimes you just have to be lucky enough to be in the right place at the right time. I would have overlooked this tiny green spheroid on a grape leaf had I not caught a female Hummingbird Clearwing in the act of ovipositing.


This closeup of the egg really pushes the limits of the camera's macro.



The stabilimentum of a Lined orbweaver (Mangora gibberosa) – and its handicrafter hiding in the background – easily passed by had the light not caught the silk set against a shaded background. A small spider, the adult female is only about 6 mm in length.




At 3 mm the fancifully named Bowl and Doily Weaver (Frontinella communis) is only half as long. Again, it was the web which gave away the spider's location, otherwise it would have been virtually impossible to spot the tiny arachnid despite its bold, contrasting markings.




What appears at first glance to be a blob of mud stuck to the seed pods of a mustard plant is the handiwork of one of nature's own potters, Eumenes fraternus, more commonly known as – what else? – a Potter Wasp.



A photo taken two days later ... this time the picture includes a complimentary Toadflax Brocade Moth (Calophasia lunula).


Like much out there in the living world the tiny urn (I would guesstimate it's diameter to be about 10 mm) is appealing esthetically, but it's purpose is of course functional, not decorative. The female builds, provisions and seals the nest for its larva; I believe the caterpillar within is a Cankerworm. (By the way, this is a different nest that in the photo above and I found it already broken, I didn't crack it open just to examine the contents.)



No worries about overlooking these boldly colored "bees". The black-and-white wasp on top is Philanthus politus – a Beewolf – and aptly named, as the females sting and paralyze various host bee species in order to provision their larvae. The victim on the bottom with the red abdomen is Sphecodes spp., a member of the Halictid Bee (Sweat Bee) family. Generally Halictid bees collect pollen in the manner of many other bees to feed their young, but Sphecodes is a kleptoparasite, laying its eggs in the nests of other Halictic and Plasterer Bees.




Prickly Ash is so-called for good reason, but these "thorns" are the wrong shape and color. And sometimes one chances across the same thorns on a tree such as Boxelder, where they are definitely out of character. A closer look reveals that these are cleverly disguised Flatid Planthoppers, probably Metcalfa pruinosa. It's fascinating that in order for the deception to succeed the insects must instinctively act as a group and stagger themselves along the twig. A lone planthopper on a twig would hardly look like a thorn, would it?



The long, lacy, almost ethereal fronds of this fern growing in the moist woodland soil at the Vanderwater Conservation Area caught my eye. An expert would no doubt have known what these were, but as a novice to the world of non-flowering plants, one fern looks much like another to me. To facilitate identification I make a practice of studying and photographing the overall aspect of the plants as a group, the fronds, the pinnae, the stipe ...


... and the spore-producing sori on the undersides of the fertile fronds – which also bore small green growths that proved to be pivotal in establishing the identity of the plant. In point of fact, this is a Bulblet Fern (Cystopteris bulbifera) and the little bulblets will eventually drop off and grow into new ferns.




Always look twice indeed – an ant with a ginormous blue-green head scuttling among the debris on the forest floor certainly called for a double take.



Attributing human qualities to an insect may not be good science, but it does seem as if this Katydid nymph is staring back at the camera in a bellicose manner. An insect with attitude – "What're ya'll lookin' at?"

Saturday, July 10, 2010

Imitation is the sincerest form of flattery ...

... and for many species it's also a means of ensuring survival. Batesian mimicry is a kind of mimicry where a harmless species has evolved to imitate the warning signals of a stinging, toxic or in other way dangerous species. (This is different than mimesis, where the mimic assumes the colors and/or profile of, for example, a leaf, twig or bark).

Hummingbird moths generally hover while nectaring and are seldom seen sitting as this one is. I'm calling this a Snowberry Clearwing (Hemaris diffinis) but since this is the only image thus far perhaps the name should be left at the genus level. Ventral view(s) would have helped confirm the species. Further reading at BugGuide.Net

This helps. Not the best of pictures since it's hard to aim the camera at a moving target, but the underside of the moth is visible, and it fits the description for Hemaris diffinis. In the field, even while hovering or flying, this clearwing appears smaller and its color is distinctly greenish compared to ...

... the Hummingbird Clearwing Moth (Hemaris thysbe), nectaring at wild bergamot. This moth has red on the dorsal surface of the abdomen and whitish legs (compare to the legs of the moth depicted above).

Ventral and dorsal views of another Hemaris thysbe


Its overall solid blue-black colors, habit of flicking its tinted wings, and quick nervous manner of moving about while nectaring ... everything about the appearance and behaviour of this Chalcosyrphus chalybeus indicated it was a solitary spider wasp. This insect is actually a species of flower fly, of the family Syrphidae, related to the ubiquitous little black-and-yellow striped hover flies commonly encountered in fields and gardens.


Here are a few more insect imposters I've stumbled across on my travels through thickets of thistles, nettles, prickly ash and poison ivy.

A Tachinid fly, Cylindromyia sp.


A female Clematis Clearwing Moth (Alcathoe caudata)


A species of Long-horned Beetle, Clytus ruricola


A fly, Macroceromys terminalis (formerly genus Xylomya). Thanks to David Bree for help with the I.D. on this one.


This small wasp-like robber fly is only about 10 mm long. At first I thought it might be a species of Eudioctria but having done more research on the Internet it seems this is more likely a member of the Laphria sicula/canis/winnemana complex. The first image is a bit out of focus but the long proboscis is quite visible. And it wasn't long before the fly put it to use ... it looks like it has captured a small beetle.