duchirtros

Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done. In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold, or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range, and remotely controlled or robotic machines can reduce risk to humans.

Female Bird Flying Throw Fog Morning Day

Herd Of small fishes groups up with granys near coral reefs

Three White Goose Going Over Blue Lake Afternoon

Big Water turtle Head Up Iam Diving To You

Seagulls learn, remember and even pass on behaviors, such as stamping their feet in a group to imitate rainfall and trick earthworms in to coming to the surface. Gulls are generally monogamous and most mate for life. They vigorously safeguard their offspring, even becoming aggressive in their nesting areas if their chicks are threatened. While gulls do divorce if a pair is unable to produce healthy chicks, many gull colonies appear to have a divorce stigma. A previously mated bird could be seen as less desirable for several nesting seasons after splitting from a partner. Gulls typically use a basic scrape nest or a shallow platform built with weeds, twigs, or other debris. The eggs are often heavily camouflaged to blend in with pebbles or sand, and 1-3 eggs are typical for most gull broods. These birds nest on beaches, cliffs, roofs, and similar places, and they often return to the same nesting site for many years. Gulls all have a distinct jizz, but their sizes vary widely. The little gull (Hydrocoloeus minutus) is the smallest at just 11-12 inches long, a wingspan of 24 inches, and weighing just 3-5 ounces. The great black-backed gull (Larus marinus) is the largest gull at 28-30 inches long with a 60-inch wingspan and a weight of 3-4 pounds. Gulls face many threats common to seabirds, such as risks from oil pollution, fishing line and net tangles, and plastic ingestion. One-legged gulls are not an uncommon sight, and while these birds are adaptable to this type of injury, conscientious birders and all gull-lovers should take steps to protect these unique and fascinating birds. Young gulls form nursery flocks where they will play and learn vital skills for adulthood. Nursery flocks are watched over by a few adult males and these flocks will remain together until the birds are old enough to breed.