Termites are animals only found in the Savannah Wildlife Addon. There are 2 different variants: Normal Termite and Black Termite. They were proposed to be added to the savanna, but weren't added as the savanna didn't win the Biome Chooser in 2018.
Official Description[]
They attack all animals/players. Black Termites have a poisonous attack. They're found in or around termite mounds.