What is an important characteristic of visual repellents for pest birds?

An important characteristic of visual repellents for pest birds is that they should be easily visible and move with the wind. This visibility is crucial because the purpose of these repellents is to create a visual deterrent that alerts birds to potential danger. When the repellent is prominent, it can effectively startle or confuse the birds, which discourages them from approaching the area.

Movement enhances the effectiveness of the visual repellent, as birds are more likely to react to dynamic objects in their environment. When the repellent flutters or sways in the breeze, it mimics the unpredictability of threats, further deterring birds. Thus, easily visible and wind-movable characteristics contribute significantly to the intended repellent effect.