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A harp trap in Borneo. A harp trap is a device used to capture bats without exposing them to disentangling from traps like mist nets and hand nets.It capitalizes on bats' flight characteristic of turning perpendicular to the ground to pass between obstacles, in this case the trap's strings, in which flight attitude they cannot maintain their angle of flight and drop unharmed into a collection ...
Mist net handling requires skill for optimal placement, avoiding entangling nets in vegetation, and proper storage. Bird and bat handling requires extensive training to avoid injury to the captured animals. Bat handling may be especially difficult since bats are captured at night and may bite.
The trap features a chain with a swivel snap at one end and a ring at the other; the spikes on its jaws point inward. Traps of this kind were commonly used for black bear trapping and were set with clamps (these types are not used any more) Setting and triggering a "gin" or foothold trap, demonstrated at the Black Country Living Museum
Similar ranges of traps are sized for to trap other animal species; for example, rat traps are larger than mousetraps, and squirrel traps are larger still. A squirrel trap is a metal box-shaped device that is designed to catch squirrels and other similarly sized animals. The device works by drawing the animals in with bait that is placed inside.
English: Diagram of a Cricket ground showing various fielding positions and variations of the field as it may be set for a right-handed batsman. Changes compared to Cricket fielding positions2.svg. Closer in → nearer the batsman; very close in → very near the batsman; toward 90 deg to the pitch → level with batsman's crease
The black flying fox or black fruit bat (Pteropus alecto) is a bat in the family Pteropodidae. It is among the largest bats in the world, but is considerably smaller than the largest species in its genus, Pteropus. The black flying fox is native to Australia, Papua New Guinea, and Indonesia. It is not a threatened species.
A Berlese funnel or Berlese trap is a device used to extract desiccation-intolerant invertebrates from samples of soil or leaf litter. It works by creating a desiccation gradient over the sample such that mobile organisms will move away from the dry environment and fall into a collecting vessel, where they are preserved for examination.
Infiltration galleries may be used to supplement a storm sewer, by directing storm runoff from non-road areas.. While the catchbasins under sewer grates work well on swift-flowing surfaces like asphalt and concrete, heavy storm water flow on grass lawns or other open areas will pool in low areas if there is no outlet.