Woodpeckers and opposums

Opposums

Explanation:

woodpeckers eat both meat and vegetable matter. Their diet includes insects, grubs, birds' eggs, and small rodents as well as fruit, nuts, and tree sap.

According to a study published in the Proceedings of the Royal Society B, opossums kill around 90 percent of the ticks that attempt to attach and feed on them. The study notes opossums are particularly good at grooming themselves, which leads them to swallow most of the ticks that attach themselves.

nucleus

would be most reasonable answer tbh