I am currently conducting an experiment with 8 feeders (normal number). In a straight line under my patio, I have feeders at 37 feet(5-1 ratio), 34' (4-1), 31' (3-1), 28' (2-1 wow very thick), 25' (4-1), 22' (4-1), 19' (4-1) & 16' (4-1 ratio). This footage is from where I normally sit. With all feeders filled with 4-1 sugar water, the 37 foot distance feeder is the most popular. The order of poplularity has been 37, 34, 31, 28, 19, 16, 25 & 22. After 4 hours that seems to remain the same although #1 may have shifted to 34' (not certain about this as the 34' feeder has always been very popular, but definitely not to the 28' or 31'). Will know more by tomorrow. There are enough birds moving each other around that a large number of birds have tried the 3-1 & 2-1 ratios and they don't appear to like it any better. Also, my feeders do not leak, but the birds are a little sloppy and the wasps have been on the 5-1 feeder just as much as the 2-1. Strange! Have maybe 12 birds on the feeders most of the time; maybe 30 or more late in the evening or when raining.