Ants do feature a very characteristic silhouette with the three round bits forming their head and body. There is many ways of simulating this. One is to fix a piece of round foam onto a hook. many like this. I tend not to have many things rubber and foam around the house, but I have plenty of deer hair in my fly tying kit.
So the elements to imitate are - the silhouette, the legs and maybe the wings of the flying type. So here is what you need.
Deer hair, preferably dark of black. Black is hard to get I found. It is died black of course. If you are into making you own stuff you could stain it yourself. Veniard sells specific colors for dying fly tying materials.
Dubbing - black or reddit brown depending on the coloration of the naturals you find where you fish.
The legs can be imitated with hackle or with deer hair. Rubber legs do a good job too.
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