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Vivitar 90mm f/2.8 Macro + 2X Vivitar Teleconverter
[ 0.017 sec (1/60) | f/2.8 | ISO 400 | Manual exposure ]
This is a wasp tied up in a spider's web. I think that the wasp was still alive here, but I'm not sure. Its mouth parts seemed to move now and then as if it was trying to chew its way out.
The spider was a house spider - quite a lot bigger than the wasp. I had no idea that house spiders fed on wasps, but they obviously do.
I didn't see these wasps (there were two in the web) land in the web. I had been watching the spider for a while and then went away for 20 minutes or so. When I came back there were the wasps all cocooned like this. I wonder if the spider had stored them somewhere and then brought them back to the web where it could handle them and feed on them.
It makes a change for me to feel sadness and sympathy for wasps. A few years ago I watched wasps attacking and then decapitating bees. I felt sorry for the bees then, and no sympathy for wasps. But wasps meet harsh ends too. All part of nature's cycle.
Parked at the Blisland depot on a sunny Saturday afternoon was Webbers KVL63H, a leyland Panther woth Roe bodywork, new to Lincoln as their 63
Modelo:Marta Segura
FotografÃa y Edición: Javier P Jayma
jaymafotografia.com/
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Mérito de mi hermana Elia quién tomó esta hermosa foto...
Camera: Nikon D90
Exposure: 1/125
Aperture: Æ’/5.6
Exposure Program: Auto
Focal Length: 98 mm
ISO Speed: 200
Lens: Nikkor AF-S DX 18-105 G ED VR
I love the dew on the spider webs. This one caught my eye and this was the best angle I could get on it.
It can be a little alarming to look out over a meadow at morning and see all the spider webs, made visible by droplets of dew. Right now, hardly a bush nor clump of wild grass isn't crowned by the bizarre, double layered web of the Bowl-and-Doily Spider (an insect is knocked out of the air by the tangle of webs above, then falls into the bowl below, where the tiny spider is waiting). When the dew evaporates, the webs disappear -- you'd never even know they're there!
Credit: Michael Schramm/USFWS
During the process of making an orb web, the spider will use its own body for measurements.
Many webs span gaps between objects which the spider could not cross by crawling. This is done by first producing a fine adhesive thread to drift on a faint breeze across a gap. When it sticks to a surface at the far end, the spider feels the change in the vibration. The spider reels in and tightens the first strand, then carefully walks along it and strengthens it with a second thread. This process is repeated until the thread is strong enough to support the rest of the web.
After strengthening the first thread, the spider continues to make a Y-shaped netting. The first three radials of the web are now constructed. More radials are added, making sure that the distance between each radial and the next is small enough to cross. This means that the number of radials in a web directly depends on the size of the spider plus the size of the web. It is common for a web to be about 20 times the size of the spider building it.
After the radials are complete, the spider fortifies the center of the web with about five circular threads. It makes a spiral of non-sticky, widely spaced threads to enable it to move easily around its own web during construction, working from the inside, outward. Then, beginning from the outside and moving inward, the spider methodically replaces this spiral with a more closely spaced one made of adhesive threads. It uses the initial radiating lines as well as the non-sticky spirals as guide lines. The spaces between each spiral and the next are directly proportional to the distance from the tip of its back legs to its spinners. This is one way the spider uses its own body as a measuring/spacing device. While the sticky spirals are formed, the non-adhesive spirals are removed as there is no need for them any more.
After the spider has completed its web, it chews off the initial three center spiral threads then sits and waits. If the web is broken without any structural damage during the construction, the spider does not make any initial attempts to rectify the problem.
The spider, after spinning its web, then waits on or near the web for a prey animal to become trapped. The spider senses the impact and struggle of a prey animal by vibrations transmitted through the web. A spider positioned in the middle of the web makes for a highly visible prey for birds and other predators, even without web decorations; many day-hunting orb-web spinners reduce this risk by hiding at the edge of the web with one foot on a signal line from the hub or by appearing to be inedible or unappetizing.
Spiders do not usually adhere to their own webs, because they are able to spin both sticky and non-sticky types of silk, and are careful to travel across only non-sticky portions of the web. However, they are not immune to their own glue. Some of the strands of the web are sticky, and others are not. For example, if a spider has chosen to wait along the outer edges of its web, it may spin a non-sticky prey or signal line to the web hub to monitor web movement.