Researchers have named a moth species "Pyralis papaleonei," or "Pope Leo moth," in honor of the Holy Father.
"The new species is dedicated to the head of the Catholic Church, Pope Leo XIV," authors Peter Huemer, Lauri Kaila, and Andreas H. Segerer wrote in a research article on the species. "The pontiff is a strong advocate of climate and environmental protection, and we hope that his voice may serve as an example for humanity."
In the journal, Nota Lepidopterologica, the entomologists said the species was discovered on the Mediterranean island of Crete. It is a medium-sized species with a 2-centimeter wingspan, gold spots, and prominent white bands.
"Furthermore, due to its distinctive coloration and overall appearance, the new species belongs to a group of Pyralidae whose species names refer to high secular or ecclesiastical offices including Pyralis regalis, Pyralis imperialis, Pyralis princeps, and Pyralis cardinalis," they wrote.
Butterflies are often named after external characteristics, geographical locations, or in honor of distinguished individuals, according to a press release from Tiroler Landesmuseum Ferdinandeum, or the Tyrolean State Museum, located in Innsbruck, Austria.
Within the Pyralis genus, a different tradition has emerged. As early as 1775, Austrian naturalists and Jesuits Michael Denis and Ignaz Schiffermüller described the first species of the group as Pyralis regalis, or "royal," due to its coloration.
This prompted similar names including Pyralis princeps and Pyralis cardinalis, which belong to the superfamily Pyraloidea comprised of 16,000 described species worldwide.
In the Old Testament (Genesis 2), Adam is instructed to name all animals. According to the museum, this led to the action of taxonomy — the science of classifying, naming, and categorizing organisms — to often be considered, "in the biblical sense, the oldest task of humankind."
According to Huemer, head of studies at the Tyrolean State Museum, the naming process is more than a scientific act but a symbolic gesture. For the Pope Leo moth, it is an appeal to the head of the Catholic Church and to draw attention to humanity's central responsibility for the preservation of creation.
"We are facing a global biodiversity crisis, yet only a fraction of the world's species has been scientifically documented," Huemer said in a statement. "Effective conservation of biodiversity requires that species are first recognized, described, and named."
Huemer's call echoes the pope's "call for conversion" at a 2025 international conference on climate justice, celebrating the 10th anniversary of Pope Francis' encyclical Laudato Si'.
"It is only by returning to the heart that a true ecological conversion can take place," the Holy Father said. "We must shift from collecting data to caring, and from environmental discourse to an ecological conversion that transforms both personal and communal lifestyles."
