Gopher tortoises have been known to scavenge carrion and eat excrement. Grizzly bears also readily scavenge food or carrion left behind by other animals. Unlike other hyenas, aardwolves do not scavenge or kill larger animals. Though attacks on live humans are rare, striped hyenas will scavenge on human corpses. Bacteria absorb dissolved organic matter containing minerals as they scavenge phytoplankton blooms. However, pigs being omnivores, may scavenge any carcasses left near the scrub-land. They also scavenge on prey dropped from the nesting platforms of sea eagles. "Portia" may also scavenge corpses of dead arthropods they found, and consume nectar. TEAL also functions to scavenge water and oxygen. Opportunistic feeders, they also scavenge at garbage dumps, marinas and docks. The narrators scavenge through the trash to collect mementos. Unlike some gull species, they do not scavenge at landfills. Like most crows, they will scavenge at landfills, scattering garbage in the process. It has been also found that Arctic wolves scavenge through garbage. This species is not known to scavenge or steal from other predators.