BTW - Magnificent photos you two !
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I wonder why they need those more visible tips:
Are they sexy to other dragons?
Do they help them achieve better spacing when flying in formation?
Are they anti-crash signals for stupid birds?
- I looked it up quick and it basically is for controlled gliding at higher speeds.
Pterostigma - Wikipedia
. . .
This is not an illusion, or a trick. It is in midair.
If you look at the top closely you will see it's hanging by a spiders "thread".
There are people out there trying to find out how much of the nectar to collect in order to get a high. LOL
As it turns out, bumble bees have a very interesting system for storing pollen, which begins with pollen collection. Because they are extremely fuzzy animals, pollen sticks to them every time they visit flowers. It sticks to their antennae, their legs, their faces, their bodies. They become one giant pollen magnet.
One of the really neat things I learned about bumble bees (and apparently beetles and ants), is that they actually have a special structure just for cleaning their antennae. Located on their front legs is a special notch. The inside curve of this notch is lined with a fringe of hairs that work like a comb. Have you ever watched a beetle, ant or bee wash itself? It will draw its antennae through this notch, and the comb-like hairs brush off pollen and any other debris that might be there. Pretty nifty.
Meanwhile, the middle legs are also equipped with brush- (or comb-) like hairs. These are run over the body, scraping off the collected pollen. From here the pollen is transferred to the pollen presses located on the hind legs.
At this point we have to take a good look at those back legs. Just like us, the bee’s legs have a tibia, which is the lower leg (think of your calf). On bumble bees the tibia is flat, somewhat convex, shiny and surrounded by hairs, some of which are rather long and stiff. This forms what is called the pollen basket. Located at the lower end of the tibia (think of your ankle) is a comb-like structure, and on the metatarsus (think of your heel or foot) is the press. These two structures work together kind of like levers.
So, the pollen (which has been moistened with nectar to make it sticky) is transferred to the press and the bee manipulates the press and comb to press the pollen onto the bottom part of the flattened tibia. Each new batch of pollen is pressed onto the bottom of the basket, pushing the previous batches further up. When the basket is full, it will bulge with upwards of one million grains of pollen. The hairs that surround the tibia hold the pollen in place while the bee flies from place to place, either collecting more pollen, drinking nectar, or flying back home to stock the nest with this carefully gathered food, which is what her offspring will eat when they hatch.
Bee pollen is considered one of the all-time great foods. Of course, the information I found on the nutritional content of bee pollen is specifically for honey bee pollen, but bumble bee pollen is probably very similar. So, here are some statistics on honey bee pollen:
• It is a complete protein;
• It is the only known food to contain all 22 amino acids that the human body needs but cannot produce for itself;
• It contains more protein than any meat or fish;
• It takes a honey bee about an hour to collect one pellet (basketful) of pollen;
• A teaspoon of honey bee pollen contains about 1200 of these pellets.
(Honey bees, by the way, have crevices on the backs of their knees, and it is into these that the gathered pollen is stuffed.)
Pollen collection by honey bees
While we normally think of honey bees collecting nectar, an average-size colony may bring in 100 pounds of pollen in a season. Pollen is an essential part of the honey bee diet, providing a wide range of nutrients including protein, carbohydrates, lipids, vitamins, and minerals.
Although a tough outer coating protects the pollen from environmental stressors, honey bees have enzymes in their digestive tract that split the grains apart at a weak point. The interior is then digested and the empty husks are excreted. Most of the pollen is eaten by nurse bees. They use the nutrition absorbed from it to secrete royal jelly from their hypopharyngeal glands. The jelly is fed to young larvae, including workers, drones and queens. After about three days the jelly is mixed with bee bread—a mixture of whole pollen, honey, and enzymes—and fed to the workers and drones until they spin their cocoons. The queens receive a steady diet of royal jelly throughout their development.
Most bees collect just pollen or just nectar on any trip, but a few carry both at the same time. The pollen is stuffed into hairy receptacles on their hind legs called corbiculae. A single bee can carry about half her own body weight in pollen.
Once back at the hive, the workers stuff the pollen into an awaiting cell. Unlike nectar-carrying bees, pollen-carrying bees have to off-load it themselves. In addition to depositing the pellets from their sacks, they may also groom away any pollen that is stuck to their bodies. The pollen is stored in cells at the perimeter of the brood nest, forming a ring around it. During the brood rearing season, the pollen is stored for only a few days. During the winter it is stored for much longer.
Honey bees usually forage on only one kind of flower on any single trip. This is nature’s way of assuring that plants are cross-pollinated. So a bee going to blackberries, keeps going to blackberries until there are no more blackberry flowers, then she will switch to something else. Honey bees collect pollen even from plants that don’t provide nectar, such as corn. In corn-growing regions, pesticide-contaminated corn pollen is suspected of causing severe health problems within the hive.
What do you suppose this rather big weird looking thing is?