Sentences with phrase «birds flap»

Birds and bats may both fly, but whereas birds flap their forelimbs (akin to a human flapping their entire arm), bats flap their very specialized long digits (akin to a human flapping just their hands).

In his video work, Tracking (2010), the entire scenery is presented in inversed monochrome — white birds flap gracefully against the black sky.

Tapping on any bird that is touching two or more similarly colored friends makes them burst into a shower of feathers, and new birds flap into replace them.

Follow your guide through dense tropical forest as native birds flap through the leafy canopy above.

As the birds flap their wings downwards, they create a single large air vortex ring behind themselves rather than two small ones.

Now, they have found that brain areas around these vocal learning centers become active when the birds flap their wings or hop around.

When I see a bird flap its wings amongst the clouds above, I know that bird is Jesus.

If you've ever noticed an animal shake itself as they all do, or a bird flap its wings profusely (usually after after a particularly intense situation for them), that's because they are alleviating themselves of the initial and sudden stress that the situation created within their bodies.

Paleontologist Dennis Voeten and colleagues decided to look for other features that might indicate the dino - birds flapped their wings while flying.

The examination suggests the ancient dino - bird flapped its wings while flying.

Over the last year there has been much rejoicing over a snippet of videotape that shows a large bird flapping through cypress trees in Arkansas's Big Woods.

Think of it as a bird flapping its wings to stay afloat.

A small bird flapped above her.

One by one the synthetic birds flapped their wings and left the platform, loaded with people and equipment.

Pine and aspen shavings are usually safe to use, but the problem is that they can be blown around everywhere when a bird flaps its wings for exercise.

Tell customers to never use any lightweight bedding such as shavings that can fly around like crazy when a bird flaps its wings.

If litter is used, stick with a paper pellet or crumble instead of shavings, which can fly around too much when a bird flaps its wings.

Not exact matches

It has subdued bird prints and comes with a full front flap which makes it a wonderful bag on its own.

307300 Features: - With thirteen loops and five hanging animals toys. - ABC written tummy - time pillow. - Soft arches. - Mat the surface is thick for softness. - Playful patterns and linen details. - Multiple materials and activities on the mat: soft elephant with crinkle ear, equid with a tactile mane, crinkle tree flap and bird wings, removable apple mirror, and high - pitched monkey. - For age zero and up. - Safety - tested to fulfill or exceed ASTM, CPSIA, EN71 and applicable safety standards.

You can explain that birds have wings, and the baby bird must learn how to «flip and flap» his wings in order to fly!

Next, flap your arms like a bird.

Each flap of the wings literally creates an uplift for the bird immediately following.

Modern birds have several flying styles: They can soar on thermals like hawks and albatrosses, glide and flap like storks, or explode from the ground like pheasants and roadrunners, flapping their wings to become airborne for a few hundred meters before landing.

He adds that the flight would have been a bit different from modern birds: Archaeopteryx's shoulder joint would not have allowed it to beat its wings in the same fashion, meaning the feathered dino must have used a specialized flapping motion.

They found that its bones could tolerate low torsional forces, and so were most similar to birds like partridges that use flapping flight to go airborne for short periods, often to evade predators.

Young birds running up steep ramps flap their wings before they can fly, and scientists studying the energetics of flight have found that birds use far less energy running and flapping up steep inclines angles than they do flying at similar angles.

In 2011, as part of a reintroduction program, captive - bred ibises following an ultralight aircraft to their wintering grounds arranged themselves in the shape of a V. Data loggers on their backs captured every position and wing flap, yielding the most compelling experimental evidence yet that birds exploit the aerodynamics of the familiar formation to conserve energy.

Crested pigeons, large birds indigenous to Australia, make a warbling noise when they flap their wings to take off.

Portugal and his team also reported that the birds frequently shifted into seemingly less - optimal positions, such as directly behind the bird in front, adjusting their flapping to avoid downwash.

But that vortex moves up and down because the bird in front is flapping.

So the bird behind must not only put itself in the right place, but must also flap at just the right time — which changes depending on the distance between the birds — to keep riding the upwash.

Birds coordinate the timing of their wing flaps to best take advantage of the «flying V» formation

The team compared the thickness of the bones» walls and their resistance to torsion — a twisting force that birds» wings withstand during flapping flight — with similar bones from several dinosaurs, flying reptiles called pterosaurs and modern birds.

The primitive birds, without flight adaptations such as the muscle pulley system, wouldn't have been capable of the full range of flapping motion birds today use.

In recent years, though, scientists have started finding ways to mimic the mechanics of bird flight through various robotic ornithopters, aircraft that fly with flapping wings.

Archaeopteryx doesn't have several features considered essential to flight in modern birds, such as a keeled breastbone to which several important flight muscles attach; a ball - and - socket arrangement that allows the wing to flap fully up over the back and down again; and a muscle pulley system that links chest and shoulder muscles, allowing the birds to swiftly alternate between powerful downstrokes and upstrokes.

Most soaring needs no flapping of wings; instead, the bird exploits air currents to glide.

Birds can flap their wings to swoop, dive, glide, and alight on perches.

The US military — which part - funded this research — is keen on drones that flap like birds because they can be far stealthier than faster, fixed wing aircraft.

Archaeopteryx had wing bone structures most similar to pheasants and quails, birds that are capable of small bursts of active flapping flight, the researchers report March 13 in Nature Communications.

«If you want to understand how airplanes fly, looking at birds helps, but you may end up thinking it's all about flapping,» he says.

Flap running was over 10 times more energy efficient than flying, the team reports online today in The Journal of Experimental Biology, creating just enough aerodynamic force to push the birds» bodies upward while also supporting some of their body weight.

Increased energy consumption of larger flapping birds, such as cranes, geese, and swans that migrate between Japan and Siberia or travel similar distances in other parts of the world, limits their migration to shorter distances.

The mechanisms that the birds use is achieved firstly through spatial phasing of wing beats when flying in a spanwise («V») position, creating wing - tip path coherence between individuals which will maximise upwash capture throughout the entire flap cycle.

And they appear to save energy not because it takes less effort to flap, as theory predicted, but because lift from the wakes of other birds allows them to flap less often.

The light - weight, synchronised, GPS and inertial measurement devices, recorded within up to 30 cm accuracy where a bird was within the flock, its speed, and when and how hard it flapped its wings.

New research shows that birds precisely time when they flap their wings and position themselves in aerodynamic optimal positions, to maximize the capture of upwash, or «good air», throughout the entire flap cycle, while avoiding areas of downwash or «bad air».

The research, led by the Royal Veterinary College, University of London, proves for the first time that birds precisely time when they flap their wings and position themselves in aerodynamic optimal positions, to maximise the capture of upwash, or «good air», throughout the entire flap cycle, while avoiding areas of downwash or «bad air».

In contrast, migration ranges of soaring birds, illustrated by raptors, vultures, and albatrosses that migrate globally with minimal energy consumption, are larger than those of flapping birds and independent of body size.

«Living birds use their wings for so many different things, like flap - running up slopes and rowing across water,» says Heers.