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#Post#: 6495--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: February 17, 2017, 12:42 pm
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[center][I]From egg to flight: Hummingbirds
[/I][/center]
[center]
HTML https://youtu.be/gU_pJ8PAWwQ[/center]
--- Quote ---
>
> IMPORTANT: Do NOT feed hummingbirds sugar water or "nectar"
for more than 24 hours. It will harm the bird. Babies fed
sugar water or "nectar" may develop deformities or die.
--- End Quote ---
[center]What to Do If You Find a Hummingbird[/center]
HTML http://www.gahummer.org/what_to_do.htm
#Post#: 7468--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: July 11, 2017, 1:53 pm
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[center]When Does an Aging Bird Stop Laying Eggs?
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[center]
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[center]Laysan albatross in graceful flight[/center]
A Laysan albatross typically lives for around 40 years, spending
most of its life in the air, flying thousands of miles every
year in search of food. Once an albatross reaches adulthood,
it’s difficult to determine the bird's age, but ornithologist
Chandler Robbins banded one particular Laysan albatross back in
1956, so biologists know that the bird is still going strong. In
fact, at around 66 years of age, the bird that Robbins named
Wisdom just hatched another chick at her breeding home on Midway
Atoll in the Hawaiian archipelago. Wisdom, the world's
oldest-known wild breeding bird, is providing scientists with
valuable information about reproduction in older animals.
Not ready for retirement:
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/>
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The Laysan albatross lays no more than one egg per year, and
sometimes none. Wisdom and her mate return to the same spot
every year to rekindle their relationship.
[center][img
width=640]
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[center]Laysan Alabatross Couple [/center]
[center][img
width=440]
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[center]An Albatross named Wisdom
HTML http://www.jesusjazzbuddhism.org/learning-from-wisdom-the-albatross.html[/center]
Albatrosses mate for life, but Wisdom has outlived several males
:o :D. She is believed to have raised 30 to 36 chicks over her
lifetime.
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[move]We Albatross ladies may just have one at a time, but we
can do that for MANY years! ;D[/move]
[center]
HTML https://files.allaboutbirds.net/wp-content/uploads/2016/06/ChanRobbins-e1467835343454-720x745.jpg[/center]
[center] Renowned Ornithologist Chandler Robbins
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Chandler Robbins passed away in March 2017 at the age of 98; the
renowned ornithologist was still volunteering with the Bird
Banding Laboratory in Laurel, Maryland, during the last years of
his life.
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HTML http://www.wisegeek.com/when-does-an-aging-bird-stop-laying-eggs.htm
#Post#: 7586--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: July 29, 2017, 4:22 pm
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[center]
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[center]Splish, Splash: Why Do Birds Take Baths?[/center]
BY JOE SMITH
MARCH 9, 2015
[center]
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[center]A cardinal at a bird bath. Photo: Flickr user ehpien
under a Creative Commons license.[/center]
What does science tell us about the importance of a good bath to
a bird?
The answer: surprisingly little! ;D
A study published in 2009 stated it plainly: “Birds of most
species regularly bathe in water, but the function of this
behavior is unknown” 1.
This post is about the cool green science of bird baths: what we
know and intriguing areas of inquiry for future research.
[center]Rub-a-Dub-Dub, Many Birds in the Tub
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Despite the lack of knowledge about the function and importance
of baths to birds, we all know that birds (like the rest of us)
love having water around for bathing and drinking.
When working with migrant birds in the Yucatan Peninsula, I
first began to understand how seriously birds take the business
of bathing. We were studying warblers that were typically
territorial. These birds frequently engaged in threat postures
and even in fights to enforce the boundaries between their
exclusive home ranges at our mangrove study sites.
[center]
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[center]Birds love hanging around water. Photo: Flickr user
Prayitno under a Creative Commons license. [/center]
But at a communal bird bath, there was a nightly truce. ;D
Each evening at dusk, in a special spot in the mangroves where a
freshwater spring bubbled up from the ground, numerous American
redstarts, northern parulas, magnolia warblers, common
yellowthroats and yellow warblers took turns bathing.
One by one, they shared this little oasis before going to roost
for the night.
Seeing territorial warblers calmly taking turns for a bath tells
us that for a bird, having access to water for bathing is worth
checking one’s combative tendencies – at least for a few
minutes.
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[center]Why Birds Take Baths[/center]
So, what’s so important about a bath? ???
[center]
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[center]Starlings that take baths may be better able to elude
predators. Photo: Flickr user NatJLN under a Creative Commons
license.[/center]
The number of relevant scientific articles can be counted on one
hand. There are very basic descriptions of the mechanics of bird
bathing in North American2 and Australian birds3, an
experimental examination of wetting and drying of disembodied
feathers4, and a recent pair of studies that experimentally
deprived captive starlings of bath water 5,1.
Although the functions of bird bathing aren’t clearly known at
this point, these studies suggest that bathing plays an
important role in feather maintenance.
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Feathers are a bird’s lifeline: they insulate, waterproof and,
of course, provide the power of flight.
Feathers get replaced once or twice a year. In the interim, they
need to be kept in good condition. The sun, feather-munching
mites, bacteria and gradual wear take a toll on feathers. A set
of year-old flight feathers look like they’ve been through the
ringer: they are frayed and dull.
[center]
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[center]Photo: © Larry Niles A good bath may keep those precious
feathers in the best condition possible for as long as
possible.[/center]
Two recent studies on captive starlings have progressed our
understanding a bit further. In one paper, Brilot and colleagues
hypothesized that depriving a bird of a bath would result in
more disheveled feathers and translate into poorer flight
performance.
They tested a group of freshly-bathed starlings and a group that
had been deprived of a bath for three hours prior to the
experiment. The starlings deprived of a bath were clumsier when
flying through an obstacle course made of vertically-hung
strings, bumping into more strings as they flew.
In their second paper on starlings, the research team examined
whether the bath-deprived starlings knew they were clumsier.
They did this by presenting bathed and unbathed groups of birds
with recordings of starling predator alarm calls – and delicious
meal worms – at the same time.
The experiment indicated that birds with access to bath water
were more willing to let their guard down and feed, despite the
recorded call signaling the presence of a predator. The authors
suggest that the unbathed birds were more cautious because they
were aware that their ability to escape was impaired.
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[center]
HTML https://youtu.be/QgiCg7XAKbA[/center]
This work tells us that, beyond preserving feathers over the
long term, bathing even makes a bird a more agile flier and more
adept at escaping predators in the short term.
These studies are helpful, but the function of bathing still
eludes us.
How does it make these birds better fliers? Does it help realign
the tiny barbs that hold feathers together? Does it help
distribute protective oils? Does it improve feather performance
in some other way?
This all leaves me wondering about those birds in the Yucatan.
Our research was focused on revealing differences in habitat
quality among individuals, mainly by measuring the food
resources of the birds. We reasoned that more food equaled birds
in better condition with a better chance of survival.
But maybe we were ignoring another important aspect of habitat
quality – access to bathing water. We see from the starling work
that being deprived of a bath could make an unbathed bird easier
to catch, so baths might play a role in survival too.
Until we get an answer from science, we will need to rely on
common sense and keep those backyard bird baths full.
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Preparing Your Backyard Bird Bath
Many of us with bird feeders also have a bird bath to go along
with it. Even in the coldest months of the year, I’ve found that
birds are eager to take baths.
HTML http://www.coh2.org/images/Smileys/huhsign.gif
:o
I recently poured a warm tea kettle of water into my frozen bird
bath and there was an instant scrum as the cardinals and
white-throated sparrows jockeyed for position around the bath.
[center]
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[center]A heater keeps the backyard bird bath operational all
winter. Photo: Flickr user techno_nanna under a Creative Commons
license.[/center]
A more sophisticated approach to maintaining a bird bath in
winter is to use a bird bath heater.
Misters keep water fresh and brings a lot more attention to the
bird bath. They are a great bird attractor during the spring and
summer when people typically aren’t feeding birds.
Although it would be nice to know the exact functions of bird
bathing, a lack of scientific knowledge won’t ever get in the
way of a good bath.
HTML http://www.createaforum.com/gallery/renewablerevolution/3-040716230142.jpeg
[center]
HTML https://youtu.be/a2x-p3p2hY0[/center]
REFERENCES
Brilot, B. O., Asher, L. & Bateson, M. 2009 Water bathing alters
the speed–accuracy trade-off of escape flights in European
starlings. Anim. Behav. 78, 801–807.
Slessers, M. 1970 Bathing Behavior of Land Birds. The Auk 87,
91–99.
Verbeek, N. A. M. 1991 Comparative bathing behavior in some
Australian birds. J. Field Ornithol. 62, 386–389.
Van Rhijn, J. G. 1977 Processes in feathers caused by bathing in
water. Ardea 65, 126–147.
Brilot, B. O. & Bateson, M. 2012 Water bathing alters threat
perception in starlings. Biol. Lett. 11.
TAGS: Birds, Research
Joe Smith, PhD, explores the lives of the birds around us by
sharing insights from scientific research. As an ecologist for a
New Jersey-based conservation services company, he helps to
restore coastal ecosystems and the migratory birds that depend
on them. Joe lives in the birding hotspot of Cape May, NJ and
has done field research with birds throughout the U.S. and Latin
America. He writes about nature in his backyard at
www.smithjam.com.
HTML https://blog.nature.org/science/2015/03/09/backyard-bird-baths-science-birding-wildlife-habitat/
Agelbert NOTE: If you share your household with a kitty, please
make sure the kitty does not have easy access to the bird bath
as the following clever kitty has: ;)
[center]
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[center]Birds, what birds? I'm just here enjoying the view.
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/>
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#Post#: 7779--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: August 28, 2017, 1:12 pm
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[center]
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HTML http://www.thebigwobble.org/p/photo-of-day.html
#Post#: 8827--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: January 14, 2018, 8:20 pm
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[center]Sky Hunters, The World of the Dragonfly[/center]
The Secrets of Nature
523,680 views
[center]
HTML https://youtu.be/knlXTU1R_rE[/center]
The Secrets of Nature
Published on Dec 2, 2014
They hover over ponds and pools and inhabit the banks of rivers
and streams. With their dazzling metallic colours and unique
ways of flying they are truly jewels of the air.
This film presents dragonflies as they have never been seen
before. Fascinating close up shots take us into the world of
these insects, which have lived on earth since the age of the
dinosaurs.
Spectacular super slow motion shots and elaborate computer
animation uncover, for the first time, how dragonflies capture
their prey at lightning speed while flying and how they mate in
the air.
Underwater photography reveals the development of the predatory
dragonfly larvae while time lapse sequences show the emergence
of the fully grown insect.
However these amazingly colourful flying acrobats are in danger.
The dragonfly's preferred habitat in and around water is rapidly
diminishing, which, in Europe alone, has pushed around 80
species to the brink of extinction.
HTML http://www.desismileys.com/smileys/desismileys_1593.gif
#Post#: 10916--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: October 19, 2018, 1:45 pm
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HTML http://renewablerevolution.createaforum.com/gallery/renewablerevolution/3-200317134631.png
[center]New study reveals why dandelions are among the best
fliers — they take to the air in a unique way
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LAST UPDATED ON OCTOBER 19TH, 2018 AT 4:57 PM BY MIHAI ANDREI
SNIPPET:
Dandelions use a bundle of bristly filaments, called a pappus,
to help keep their seeds aloft for dispersal. After the pappus
takes to the air, it also prolongs the descent of the seed,
enabling it to be carried much farther away. This is not
uncommon in the plant world, as many other species employ a
similar strategy — but they have a wing-like membrane instead of
the spiky pappus.
[center]
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So Naomi Nakayama, Ignazio Maria Viola, and colleagues set out
to study exactly what happens to the dandelion flight. They
constructed a vertical wind tunnel to visualize the flow around
freely flying and fixed dandelion seeds, employing long-exposure
photography and high-speed imaging to monitor any effects. They
illuminated the seeds with a laser to make the entire system
easier to visualize.
Researchers found that air does indeed flow through the bristles
of the pappus, but the amount of air is very closely controlled
by the spacing between the bristles, and this is very important.
This particular structure formes a stable, doughnut-shaped air
bubble, floating around each pappus. They call this air bubble a
vortex ring.
Full article:
HTML http://renewablerevolution.createaforum.com/gallery/renewablerevolution/3-130418200416.png<br
/>
HTML https://www.zmescience.com/science/news-science/dandelions-best-fliers-19102018/
Agelbert NOTE: Check out the video below to get a clearer
understanding of what they disovered. 👀 🧐
[center]
HTML https://youtu.be/9RCjpm928s0[/center]
[center]
HTML http://static.uglyhedgehog.com/upload/2012/8/14/1344970546338-awesome_mc_ht_smiley.gif[/center]
#Post#: 12081--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: April 16, 2019, 8:37 pm
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[center]
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HTML http://renewablerevolution.createaforum.com/gallery/renewablerevolution/1/3-120818185039-1655102.gif
[/center]
[center]Opensource Ornithopter Prototype. Arduino Powered and
Remote Controlled[/center]
[center]
HTML https://youtu.be/ruWvzF1fGHw[/center]
Hi folks! 😀
This instruction is a story about how I made an ornithopter
prototype.
For those who do not know, an ornithopter is a machine designed
to achieve flight by flapping wings like a real bird. The idea
was to create an ornithopter from scratch, to control it
remotely, and of course to make it fly.
Please do not judge; I'm not the professional of the aircraft
industry. So, not everything works as I would like, but it still
does.
HTML http://renewablerevolution.createaforum.com/gallery/renewablerevolution/3-250817121424.gif
Instead of photos, this instruction prevails by graphic schemes.
The real result can be seen in a multi-series video on the
Youtube channel. If you enjoy this guide, subscribe to the
channel. The first series is already online.
The instruction will be corrected and supplemented with material
over time. The ornithopter will also be improved.
At this moment the instructable can be divided into the
following chapters:
HTML https://www.instructables.com/id/Opensource-Ornithopter-Prototype-Arduino-Powered-a/<br
/>🧐
[center][img
width=640]
HTML https://cdn.instructables.com/F4I/4OSQ/JUGRVBQ3/F4I4OSQJUGRVBQ3.LARGE.jpg?auto=webp&width=933[/img][/center]
#Post#: 12152--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: April 23, 2019, 6:40 pm
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[center]Opensource Ornithopter Prototype. Arduino Powered and
Remote Controlled.[/center]
By gabbapeople in Arduino
[center]
HTML https://youtu.be/ruWvzF1fGHw[/center]
Learn more:
HTML http://www.createaforum.com/gallery/renewablerevolution/3-060914180936.jpeg
HTML https://www.instructables.com/id/Opensource-Ornithopter-Prototype-Arduino-Powered-a/
#Post#: 12198--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: April 28, 2019, 1:15 pm
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[center]The Giant Bird That Got Lost in Time[/center]
492,198 views
[center]
HTML https://youtu.be/gWP_tFJmC40[/center]
PBS Eons
Published on Mar 12, 2019
The California condor is the biggest flying bird in North
America, a title that it has held since the Late Pleistocene
Epoch. It's just one example of an organism that we share the
planet with today that seems lost in time, out of place in our
world.
Thanks as always to Studio 252mya for their wonderful paleoart.
You can check out more of their work here:
HTML https://252mya.com
Produced in collaboration with PBS Digital Studios:
HTML http://youtube.com/pbsdigitalstudios
Super special thanks to the following Patreon patrons for
helping make Eons possible:
Katie Fichtner, Anthony Callaghan, XULIN GE, Po Foon Kwong,
Larry Wilson, Merri Snaidman, Renzo Caimi, Ordenes, John Vanek,
Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory
Donovan, Ehit Dinesh Agarwal,
الخليفي
سلطان, Gabriel Cortez, Marcus
Lejon, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman,
Betsy Radley, PS, Philip Slingerland, Jose Garcia, Eric Vonk,
Tony Wamsley, Henrik Peteri, Jonathan Wright, Jon Monteiro,
James Bording, Brad Nicholls, Miles Chaston, Michael McClellan,
Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen,
Daisuke Goto, Hubert Rady, Gregory Kintz, Tyson Cleary, Chandler
Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ron
Harvey Jr, Jacob Gerke, Alex Yan
If you'd like to support the channel, head over to
HTML http://patreon.com/eons
and pledge for some cool rewards!
#Post#: 12714--------------------------------------------------
Re: Flight
DIR By: AGelbert
Date: June 25, 2019, 5:31 pm
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[center]The ideal shape for a multirotor ‘ducted-fan’ that can
dramatically improve thrust and flight time.[/center]
Posted on January 14, 2015 by Richard
2018 update: User Wob Barley has built a working model of this
duct based on David’s model (see update below) and done some
tests which suggest an impressive 40% efficiency/40% thrust
increases over open propellers. Here is a video of the test
flight.
[center]
HTML https://youtu.be/it2o1WRWHKQ[/center]
[center]
HTML http://renewablerevolution.createaforum.com/gallery/renewablerevolution/1/3-120818180835-1626482.gifhttp://renewablerevolution.createaforum.com/gallery/renewablerevolution/1/3-120818185039-1655102.gif[/center]
Learn more:
HTML http://www.createaforum.com/gallery/renewablerevolution/3-060914180936.jpeg
HTML https://capolight.wordpress.com/2015/01/14/quadcopter-rotor-duct/
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