I'm not so sure, same swims, same time of day, same lures, same weather conditions and fish acting completely different lol. Not just perch either, spent the other day in heavy rain laid on my stomach at the top of a high banked drain trying to catch chub which are really skittish on leger, only 1 to 2 feet deep but got them confident over my bait, tried bread, maggots and worm just not interested in feeding, only managed a couple of small chub up to about a pound the day before and a couple of roach same sort of size. Nice to catch in those sort of venues as opposed to a commercial but they