{"id":297,"date":"2025-07-08T13:50:17","date_gmt":"2025-07-08T13:50:17","guid":{"rendered":"https:\/\/scienceblog.com\/wildscience\/?p=297"},"modified":"2025-07-08T13:50:17","modified_gmt":"2025-07-08T13:50:17","slug":"feral-rabbits-dont-just-go-wild-they-evolve-into-something-entirely-new","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/wildscience\/2025\/07\/08\/feral-rabbits-dont-just-go-wild-they-evolve-into-something-entirely-new\/","title":{"rendered":"Feral Rabbits Don\u2019t Just Go Wild \u2014 They Evolve Into Something Entirely New"},"content":{"rendered":"

When domesticated rabbits escape captivity and establish wild populations, they don’t simply revert to their ancestral forms\u2014instead, they develop distinct anatomical features never seen in either wild or domestic rabbits. A comprehensive study of 912 rabbit skulls from around the world reveals that feralisation creates novel evolutionary pathways, with escaped domestic rabbits occupying an intermediate morphological space while also exploring entirely new body plan territories.<\/p>\n

The research, led by Associate Professor Emma Sherratt from the University of Adelaide and published in Proceedings of the Royal Society<\/a>, challenges conventional assumptions about how animals change when returning to natural environments. Rather than simply reversing domestication effects, feral rabbits demonstrate that human-influenced evolution can produce unpredictable anatomical innovations.<\/p>\n

Morphological Innovation Through Feralisation<\/h2>\n

“Feralisation is the process by which domestic animals become established in an environment without purposeful assistance from humans,” Sherratt explained. “While you might expect that a feral animal would revert to body types seen in wild populations, we found that feral rabbits’ body-size and skull-shape range is somewhere between wild and domestic rabbits, but also overlaps with them in large parts.”<\/p>\n

The study analyzed specimens from 20 locations worldwide, comparing wild European rabbits from their native Iberian Peninsula with domestic breeds and feral populations established through human introductions. Using advanced geometric morphometric techniques, researchers mapped skull shape variations across the entire spectrum of rabbit populations.<\/p>\n

Domesticated rabbits showed the greatest morphological diversity, occupying substantially more shape-space than their wild counterparts. However, feral populations revealed the most intriguing patterns, developing anatomical features that positioned them not just between wild and domestic forms, but in previously unexplored morphological territories.<\/p>\n

Geographic Patterns Reveal Environmental Drivers<\/h2>\n

The extent of morphological change in feral rabbits correlated strongly with distance from their native range. European feral populations showed modest deviations from wild forms, while rabbits in Australia, New Zealand, and remote islands displayed the most dramatic anatomical modifications.<\/p>\n

Key findings include several notable patterns:<\/p>\n