Commensalism

Barnacles create home sites by attaching themselves to whales.

Ticks feed on deer blood with harms the deer.

Yucca flowers are pollinated by yucca moths. The moths lay their eggs in the flowers. Both species benefit.

Hermit crabs live in shells made and then abandoned by snails.

Honey guide birds alert and direct badgers to bee hives. The badgers feed on the honey and then allow the birds to eat.

Mistletoe extracts water and nutrient from the spruce tree it is attached to.

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