While using owl calls as signals was a clever tactic employed by Harriet Tubman during her missions on the Underground Railroad, there were challenges involved. One significant challenge was ensuring that both refugees and freedom seekers correctly interpreted these signals amidst potentially dangerous situations. The accuracy of mimicking owl calls had to be precise so as not to raise suspicion among slave catchers or others who might pose a threat. Additionally, factors such as weather conditions or unfamiliar environments could affect the effectiveness of these signals. Despite these challenges, Tubman's adeptness at using owl calls demonstrated her resourcefulness in leveraging nature for communication and safety.