There are several different ways to make both long and short sections of fence more visible. Short sections are a quick fix for hot spots of entanglement.

MAKING LONG SECTIONS OF FENCE MORE VISIBLE

1. Discarded white electric fence tape can be strung above the top strand of barbed wire, and secured to wooden fence posts with fencing staples, or tied with cable ties to star pickets. If tying lengths of tape together, avoid loose ends if likely to tempt grazing livestock.
The tape offers good visibility, as it is white and shimmies in the wind; it also acts as a physical barrier. It is cheap, quick and easy to put up, especially over long distances. The photos below show Brian Naughton, the originator of the idea, on his property on the Atherton Tablelands.

2. Use of white nylon wire

3. Timber fencing

4. Quick fix tags

5. Split polypipe

White timber fencing for horses

Split polypipe over top plain wire

50 mm electric tape on top, white nylon wire underneath

Quick fix tags, Montana, USA

Recycled electric fence tape, Brain Norton, Millaa Millaa

MAKING SHORT SECTIONS OF FENCE MORE VISIBLE

1. 1.Tags need to move in the wind and reflect available light at night. The fence (on right) in the Northern Territory was entangling Little Red flying foxes. “We drill a hole in the top and bottom of the CDs, attach a fishing swivel to each, and then attach to the fence with ties. The local bee keeper also uses CDs to protect her hives from bee eaters (a species of bird).” Toni Mitchell
   

2. 2.Split polypipe, as above
   

3. 3.Electric fence tape, as above