The Cattle Egret (Bubulcus ibis coromundus) is so-called because of its close association with cattle. As the cattle move, they stir up the insects allowing the egret to pounce on them. In the absence of cattle, the egret stay close to water buffaloes LINK.
Now, Dato’ Dr Amar-Singh HSS has documented the Cattle Egret’s association with a horse at a semi-urban location in a limestone hill area at Tambun, in Perak, Malaysia. This image was taken on 11th August 2012.