View allAll Photos Tagged Membrane
Birds have a translucent third eyelid known as a nictitating membrane (Nictitating means blinking). Unlike the upper and lower eyelids, this one moves horizontally across the eye from front to back and in this Jackdaw you can see it has covered about 90% of the eye. It looks like a sliding window that hasn't been closed properly. Jackdaws have striking steely blue eyes but these are not visible here as the eye looks like it has tracing paper over it. The third eyelid serves to lubricate the eye and remove dust while maintaining some vision. It is found in birds, reptiles and sharks, but also in quite a few mammals, especially aquatic mammals like beavers where it protects the eye underwater. Polar Bears have them too, which acts like sunglasses to protect the eye in bright snowy conditions.
"a whitish or translucent membrane that forms an inner eyelid in birds, reptiles, and some mammals. "
"It can be drawn across the eye to protect it from dust (etc.)
..& .Yes is also handy when it is a group bathing session at a mud puddle....
European Starling EUST (Sturnus vulgaris)
Martindale Valley
Central Saanich BC
DSCN4590
click on image for more detail
Black swan
Close up on the head and on the nictitating membrane
This is a very big crop.
(DSC00865_DxO-1024Q96_4)
To explain a bit the serie.
These swan have already a juvenile
They just did a new nest on a little isle and ... they strongly defend it against invisible enemy. That's so funny to see. And then love time.
Nictitating membrane closed.
Nictitating membranes are found in birds, reptiles, amphibians, fish, but are less common in mammals, mainly being present in monotremes and marsupials. In humans, the plica semilunaris and its associated muscles are thought to be the vestigial remnants of the nictitating membrane and its muscles. Charles Darwin reported that the plica semilunaris is slightly larger in Africans and Australian Aborigines than in other peoples. Only one species of primate, the Calabar angwantibo, is known to have a functioning nictitating membrane.
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Membrane replacement requires the garden to be taken off it and the concrete to be revealed on the top and sides
Garden Village, Burnaby, British Columbia, Canada
I crawling around in the woods at dusk, found two newcomers. :)
An interesting phenomenon that the fungal discs are covered with a membrane or skin, which then breaks down and disappears.
magnification: 120x
Berkshire Community College Bioscience Image Library
Note oscillatory movement as filaments of Oscillatoria orient towards light.
Technical Questions:bioimagesoer@gmail.com
A full-scale JWST sunshield membrane deployed on the membrane test fixture at Mantech, Hunstville, ready for a precise measurement of its three dimensional shape. The JWST sunshield comprises five of these layers, each of which has to be precisely spaced with respect to the next.
Credit: Northrop Grumman Aerospace Systems
Blue Tree Monitor (Varanus macraei) showing its nictitating membrane, or third eyelid.
Kristiansand Zoo, Norway
A full-scale JWST sunshield membrane deployed on the membrane test fixture at Mantech, Hunstville, ready for a precise measurement of its three dimensional shape. The JWST sunshield comprises five of these layers, each of which has to be precisely spaced with respect to the next.
Credit: Northrop Grumman Aerospace Systems
In memoriam Frei Otto, 1925 - 2015
Frei Paul Otto (31 May 1925 – 9 March 2015) was a German architect and structural engineer noted for his use of lightweight structures, in particular tensile and membrane structures, including the roof of the Olympic Stadium in Munich for the 1972 Summer Olympics.
en.wikipedia.org/wiki/Frei_Otto
My professor for the construction mechanics, when I studied architecture in the early seventies, said for the Olympic Stadium in Munich - it will last until the first wind ...
Another one of those lucky/fortunate shots, were ive captured the lizards nictitating membrane in action. Ive managed to capture several of these images over the years now.
Panasonic FZ150 with a Raynox 150 used.
la membrana nittitante delle aquile reali è trasparente e questo le permette di vedere sempre!!!
altre foto/more eagles on: alainghignone.altervista.org
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nictitating membrane - a transparent inner eyelid in birds, reptiles, and some mammals that closes to protect and moisten the eye. Also called third eyelid. Or, with your cool bird - they should be called shades.
After its successful fish dive, notice the Osprey's nictitating membrane, a transparent eyelid that moves horizontally across each eye. These transparent eyelids serve several functions; for more information see:
blog.wildsidenaturetours.com/2009/08/nictitating-membrane...
The nictitating membrane (from Latin nictare, to blink) is a transparent or translucent third eyelid present in some animals that can be drawn across the eye from the medial canthus for protection and to moisten it while maintaining vision. Some reptiles, birds, and sharks have full nictitating membranes; in many mammals, a small, vestigial portion of the membrane remains in the corner of the eye. Some mammals, such as camels, polar bears, seals and aardvarks, have full nictitating membranes. Often called a third eyelid or haw, it may be referred to in scientific terminology as the plica semilunaris, membrana nictitans, or palpebra tertia.
FLARE
kinetic ambient reflection membrane
FLARE is a pneumatic building facade system. The FLARE system consists of a number of tiltable metal flake bodies. An infinite array of flakes can be mounted on any building or wall surface in a modular system of multiplied 4x4 FLARE units. Each metal flake reflects the bright sky or sunlight when in vertical standby position. When the flake is tilted downwards by a computer controlled pneumatic piston, its face is shaded from the sky light and this way appears as a dark pixel. By reflecting ambient or direct sunlight the individual flakes of the FLARE system act like pixels formed by natural light. The system is controlled by a computer to form any kind of surface animation. Sensor systems inside and outside the building communicate the buildings activity directly to the FLARE system which acts as the buildings lateral line. FLARE turns the building facade into a penetrable membrane, breaking with all conventions of the building surface as a static skin.
manufacturer: WHITEvoid interactive art & design Berlin
materials: aluminium, pneumatic pistons
special features: computer controllable, DMX protocol
country: Germany
e-mail: flare@whitevoid.com
website: www.flare-facade.com / www.whitevoid.com
A full-scale JWST sunshield membrane deployed on the membrane test fixture at Mantech, Hunstville, ready for a precise measurement of its three dimensional shape. The JWST sunshield comprises five of these layers, each of which has to be precisely spaced with respect to the next.
Credit: Northrop Grumman Aerospace Systems