With what? Themelves? Other animals? Please be more specific or finish the question please.
Yes like some bears have lice.
commensalism
The Bison
Cowbirds follow herds of bison to catch and eat the insects that are stirred up from the bison's feet. there are other bugs and flies that are attracted to the animal. The bison allow the birds to sit and rest as they guard them from the pests. It is what is called a symbiotic relationship.
Cowbirds eat insects disturbed by the bison as they graze, and will pick ticks off the bison's hide.
The two live in a symbiotic relationship ; ticks like to feed upon Bison and the Cowbirds , in turn , feed upon the ticks .
Cowbirds eat the parasites that may infest the bison. This assists them both. The cowbird gets a meal and the bison gets cleaned. This is a form of mutualism, a symbiotic relationship in which both organisms are helped, rather than commensalism where only one of the pair benefits.
no
The cowbirds remove ticks from the bison, while the bison disturb insects that are picked up by the birds.
The mummie birds have sex with there sons before there first flight to help lighten there load
Wolves occasionally hunt bison. Humans hunt bison (and raise bison for food). Grizzly bears sometimes take down a bison. Any carnivore who comes across a bison carcass (coyotes, mountain lions, foxes, birds like ravens and magpies, insects, etc.) will eat a bison.
Bison droppings give shelter to small insects as well as keeping them cool. Burrowing owls scatter it round so their offspring can grab the insects. This helps to return nutrients to the grasslands. That grass brings the bison back to eat.
In 1500 between 60 million and 125 million American bison roamed the plains. These bison were used by Native Americans as a primary food source but this did not have much effect on the bison population ?
There are two species of Bison in the genus Bison. The American Bison is Bison bison and the European Bison is Bison bonasus.