Nature Trust is a production of ACRES Inc. One can catch Jeff Britton's imaginative verbal tour of the world of nature on radio stations all across Indiana:

WBOI 89.1 FM - Fort Wayne, WBOI 91.3 FM - Orland, Wed. at 12:35 during Day to Day, Sat. at 9:30 a.m. before Car Talk, WFYI 90.1 FM - Indianapolis, Wed. at 12:35 during Day to Day

Also: 
WBSB 89.5 FM - Anderson, WFIU 103.7 - Bloomington, WFIU 100.7 FM - Columbus, WVPE 88.1 FM - Elkhart/South Bend, WNIN 88.3 FM - Evansville, WBST 92.1 FM - Muncie, WBSH 91.1 FM - Hagerstown, WBSJ 91.7 FM - Portland, WFIU 106.1 FM - Kokomo, WFIU 95.1 FM - Terre Haute, WBSW 90.9 FM - Marion, WVUB 91.1 FM - Vincennes, WBAA 101.3 FM & 920 AM - West Lafayette