I wanted this to last seven days, but I hit my limit today and had to end the project early. All the foraging experts told me in advance that the last week of May would be a pretty much impossible time of year to eat only fresh wild edibles because it's an in between time -- a time after the spring mushrooms but before the summer fruits and berries -- so there are few calories available besides meat or fish, and even those are not necessarily easy to come by without much skill and knowledge. Now I can tell you from first-hand experience that they are absolutely correct about that. I ended up fasting except for herbal teas and root foods, and it turns out the roots were mainly diuretics, liver tonics and laxatives, so I was doing a real number on my body. Survival projects like this can be incredibly educational but are rarely much fun, because they push you to the limits of what you can endure.