I went on a camping and fishing trip with my girlfriend this weekend. on saturday i was using an olive wooley bugger and did pretty well catching about 20 fish in about 4 hrs of fishing this fly has worked well all year so far on this lake. on sunday i fished again and in about 2hrs i caught only 1. i tried several different buggers, black, brown,olive with no luck. i tied on a brown wooley worm and all of a sudden every cast i either had a bite or caught a fish, on some casts i had several bites. i continued to fish for another hour until my feet got to cold to stay in the water any longer. what would the woolley worm imitate that the wooley bugger wouldn't?