"As big game, waterfowl, and predator hunters ourselves, we struggled for years with the best methods for determining wind direction when there was no apparent wind at all. During Big Game hunts, knowing wind is ALWAYS drifting, even though
imperceptible we knew that if we sat on a stand long enough, our scent would eventually begin to drift, creating "unhuntable zones" downwind from our stand. In parts of the country where there were high concentrations of hunters we knew the challenge was even greater because those big bucks were very educated, using their acute sense of smell to guide them with radar
accuracy between hunters. That's how they survived to grow so big! In the West the challenge was uniquely different; we had to deal with thermals and currents that were imperceptible by other means and our hikes in to hunting areas resulted in some big-time perspiration. (we smelled like hell!). The only practical way to avoid detection was to hunt down wind from the animals.

Waterfowl hunting created some unique challenges. Like Big Game enthusiasts, some of us Waterfowl hunters are downright fanatical about the not-so-little things. As circumstances and the law of averages typically plays out, most Waterfowl hunting days are set against a clear sky with no wind; bluebird weather. During these days, particularly during pre dawn periods, often there is no perceptible wind at all, making it difficult or impossible to set the decoys with the wind in mind. Traditional means of
determining wind direction are simply useless during the complete darkness of Waterfowl set-up so hunters typically use nothing at all; they guesstimate the direction of the wind drifts.

Firefly (originally dubbed, "Windetector") was born out of necessity. We developed and used the powder "puffers" 15 years ago and they worked fine for the most part, as long as it was light out, there wasn't any snow on the ground (contrast of the powder color with snow was difficult to see), and they didn't get clogged up. They were functional but simply didn't meet our needs so we set out to develop an electronic approach. Firefly is the result of nearly 3 years of technological research and development. It's the result of a major investment in electrical engineering married to a form factor and mechanical design that assures precise
measurement every time. This electronic instrument works and it can't be fooled. Firefly is not a gimmick, it's not a toy! It will determine wind thermals and light drifts down to two inches per second" - Tom Galley