one strip about butterflies, the "MARK TRAIL" title was almost hidden in the vein pattern of a butterfly's wings. Reception According to the Fish and Wildlife Service, "Elrod's comics typically present information promoting public awareness of imperiled species." A notable exception is the strip that ran on March 11, 2007, which depicted the African Elephant not as imperiled, but as a peril itself. Letters appeared in numerous papers taking issue with the strip's contention that, "The two main killers in East Africa are HIV/AIDS and wild animals, particularly elephants." Several papers ran letters to the editor objecting to this assertion. Jack Hill has criticized the strip for declining in quality since 1978. According to Hill, the earlier versions of the strip featured well-written plot and character development and a detailed art style, whereas later versions were marked by a loss of accuracy and detail and "a free-floating approach to perspective." In addition, time froze: scenes and plots have been recycled from the past. According to King Features, Mark now stays "forever 32". Ironically, these changes, along with the uneven art work and misplaced speech balloons (often pointed at foregrounded animals), attracted a new following among fans called "Trailheads". In some cases, daily strips have recycled art and slightly updated plots from 20- or 30-year-old strips. Updating includes deleting pipes and ashtrays, and rearranging panels. Close-ups of recycled animal art are added to cover extraneous word balloons or to create a new panel to add new dialogue. Soon after being brought in to assist on the Sunday strip in 2010, James Allen also started assisting on the daily stories as well. Some readers and fan sites noted a realistic change in the characters' anatomy and the sense of perspective in both longshots and landscapes. Radio On January 30, 1950, Mutual Broadcasting System launched a radio adaptation, Mark Trail, featuring Matt Crowley in the title role. The 30-minute episodes aired three times weekly, and 174 episodes were produced, running until June 8, 1951. A second radio series, starring Staats Cotsworth, was broadcast on ABC beginning September 18, 1950, with 51 half-hour shows that ran thrice weekly until January, 1952. The series then switched to a 15-minute format, producing 125 episodes that aired weekdays through June 27, 1952. Only a handful of the 15-minute episodes are known to have survived. The Minneapolis-St. Paul, public radio station KFAI hosted Mark Trail Radio Theatre starting