Relationship between buffalo and cowbird?
Feeding together would probablybe a better description of their
association. While cattle (or other large, grazing animals) are
grazing, insects and other preys are disturbed, making it easier
for the cattle egret to catch them. Cattle egrets are feeding on
grasshoppers, crickets, flies, moths, spiders, frogs, earthworms.
More info on cattle egret could be found on
http://en.wikipedia.org/wiki/Cattle_Egret