Abstract
A survey was undertaken in northern and eastern Saudi Arabia to determine the tick species parasitizing indigenous livestock. Hyalomma schulzei was the most numerous species but parasitizes only camels in the northern frontier region. Hyalomma dromedarii was the most widespread species parasitizing mainly camel throughout the region, except at the far north where it has been replaced by H. schulzei. Rhipicephalus turanicus was abundant on sheep and goats and the second most abundant species. The study area proved to be one of its main regions of distribution in the Arabian Peninsula. Hyalomma anatolicum excavatum was abundant on camels, sheep and goats and Hyalomma impeltatum on camels and sheep.