biophilately means the collection or study of postage stamps and other philatelic material thematically related to biology (animals, plants etc.). Lexicurio rates it Rare gem — a strength score of 82 out of 100.
Etymology
From bio- + philately.
noun
- The collection or study of postage stamps and other philatelic material thematically related to biology (animals, plants etc.).“A recent addition to the list of Life Members of the Wilson Ornithological Society is Dr. John T. Emlen, Professor of Zoology at the University of Wisconsin. […] He has three sons, all of whom are students of biology, and besides his professional work finds time to devote to conservation matters, as well as photography and biophilately.”