The phrase "a rigid tail" is correct and usable in written English.
It can be used to describe a tail that is stiff or inflexible, often in the context of animals or objects.
Example: "The lizard's rigid tail helped it maintain balance as it navigated the rocky terrain."
Alternatives: "a stiff tail" or "an inflexible tail".
It is a small, brownish bird with a distinctive thin, decurved bill, a medium-long, rigid tail, and a pale supercilium.
At one end was a rigid, boxy tail fin known as a California parachute, designed to help keep it from spinning wildly once it was released.
Animals were observed and classified according to the Racine scale: 1) freezing behaviour; 2) rigid posture with straight and rigid tail; 3) repetitive head bobbing, rear into a sitting position with forepaws shaking; 4) rearing and falling, jumping, running with period of total stillness; 5) continuous level 4; 6) lost of posture and generalized convulsion activity, usually preceding death.
Apart from the stratospheric price, the most controversial element of the B61 upgrade is the replacement of the existing rigid tail with one that has moving fins that will make the bomb smarter and allow it to be guided more accurately to a target.
With its toes just touching bottom, the animal probably had its head and neck exposed as well as its rigid tail.
They have long decurved bills, and long rigid tail feathers that provide support as they creep up tree trunks looking for insects.
In electron microscope images, phages show up as ghostly, spiderlike creatures with transparent box-shaped heads, rigid tails and a tangle of legs for gripping their prey.
The simulation produces a motion of the tail in the (x, y) plane, with the tail oscillating as a rigid body in the form of a sinusoidal wave.
The conventional pumping units were selected as the basic model to redesign the lower barbell pumping units with keeping the original structure, and a rigid lower barbell device was added at the tail of beam.
A decade ago, fashion was a rigid system.
