Scavenger

Scavenging is both a carnivorous and herbivorous feeding behavior in which the scavenger feeds on dead and decaying organic matter present in its habitat. The eating of carrion from the same species is referred to as cannibalism. Scavengers play an important role in the ecosystem by consuming the dead animal and plant material. Decomposers and detritivores complete this process, by consuming the remains left by scavengers.

Etymology
Scavenger is an alteration of scavager, from Middle English skawager meaning "customs collector," from skawage meaning "customs," from Old North French escauwage meaning "inspection," from escauwer meaning "to inspect," of Germanic origin; akin to Old English scēawian meaning "to look at", and modern English "show" (with semantic drift).

Animals
Well known scavengers of animal material include vultures, burying beetles, blowflies, yellowjackets, owls, and raccoons. Many large carnivores that hunt regularly, such as hyenas, but also animals rarely thought of as scavengers such as lions, tigers, and wolves, will scavenge if given the chance or use their size and ferocity to intimidate the original hunters (the cheetah is a notable exception); on the other hand, almost all scavengers above insect size will hunt if there is not enough carrion available, as no ecosystem provides enough dead animals year-round to keep its scavengers fed on that alone. Scavenger Dogs and crows frequently exploit roadkill. Scavengers of dead plant material include termites that build nests in grasslands and then collect dead plant material for consumption within the nest.

Animals which consume feces, such as dung beetles, are referred to as coprovores. Animals that collect small particles of dead organic material of both animal and plant origin are referred to as detritivores.

As a human behavior


In humans, necrophagy is taboo in most societies. There have been many instances in history, especially in war times, where necrophagy was a survival behavior.

In the 1950s Louis Binford suggested that early humans were obtaining meat via scavenging, not hunting. In 2010, Dennis Bramble and Daniel Lieberman also proposed that early humans were scavengers that used stone tools to harvest meat off carcasses and to open bones. They proposed that humans specialized in long-distance running to compete with other scavengers in reaching carcasses. It has been suggested that such an adaptation ensured a food supply that made large brains possible.

The eating of human meat, a practice known as anthropophagy (and known more commonly as cannibalism), is extremely taboo in almost every culture.

Occupation
Scavenger appears as an occupation in the 1911 Census of England and Wales. This job title was used to describe someone who cleans the streets, removes refuse, generally a workman (a modern-day garbage collector, janitor, or street cleaner) employed by the local public health authority. The name is properly "scavager" or "scaveger", an official who was concerned with the receipt of custom duties and the inspection (scavage) of imported goods. The "scavagers" are found with such officials of the City of London as an aleconner or beadle. These officials seem to have been charged also with the cleaning of the streets, and the name superseded the older rakyer for those who performed this duty.

Other
A Scavenger can also refer to someone who is a member of Scavenger, a group of people who are trying to reduce the amount of waste that they produce by giving away their unwanted/redundant things to other people rather than disposing of them.

There are approximately 80 members of Scavenger. Most of them are within the UK but there are members from all over the world.