From 1906 onwards, she accompanied her husband Carl Akeley to Africa, where he had been posted by the august American Museum of Natural History in New York. They were both energetic hunters. Establishing modern taxidermy and developing techniques for the presentation of African fauna in dioramas, Carl Akeley made a model of the Museum’s African gallery. Delia shared in his passion, and furnished the museums of the country with a great number of specimens. Following their divorce, during the twenties Delia travelled alone throughout the Congo, where she denounced the brutal process of colonization while continuing to participate in safaris under the cover of scientific research.