I went out with a few grad students from NC State today and they're running a study on fawn mortality. The study is being held on Fort Bragg property. These guys are patrolling the roads and woods right from the end of hunting season with an 8psi CO2 dart gun ($80 a dart) and sedating does and implanting a Vaginal Implant Transmitter (VIT, $300 a pop). They also collar the doe with a $4500 tracking collar. The collar is equipped with GPS, cellular capability and also has a VHF transmitter. When the fawn drops, so does the VIT transmitter. The transmitter detects the temperature difference and starts emitting its signal at a faster rate. When this happens they can use a yagi antenna to locate the drop site. Often though, they will zero in on the does collar first, as the doe will try to move the fawn as soon as possible. But they're capable of getting to the fawn within 2.5-3 hours and getting a collar on them. The fawn collars are VHF only and are about $500 each. They are designed to fall off after about 16 weeks and have corrugations to accommodate the growing fawn. We got one today just by luck. We weren't running the antenna and we stumbled across this female fawn. About 10 days old.