Author:
Zichello Julia M.,DeLiberto Shelagh T.,Holmes Paul,Pierwola Agnieszka A.,Werner Scott J.
Abstract
AbstractEuropean starlings are one of the most abundant and problematic avian invaders in the world. From their native range across Eurasia and North Africa, they have been introduced to every continent except Antarctica. In 160 years, starlings have expanded into different environments throughout the world, making them a powerful model for understanding rapid evolutionary change and adaptive plasticity. Here, we investigate their spatiotemporal morphological variation in North America and the native range. Our dataset includes 1217 specimens; a combination of historical museum skins and modern birds. Beak length in the native range has remained unchanged during the past 206 years, but we find beak length in North American birds is now 8% longer than birds from the native range. We discuss potential drivers of this pattern including dietary adaptation or climatic pressures. Additionally, body size in North American starlings is smaller than those from the native range, which suggests a role for selection or founder effect. Taken together, our results indicate rapid recent evolutionary change in starling morphology coincident with invasion into novel environments.
Publisher
Springer Science and Business Media LLC
Reference91 articles.
1. Feare, C. J. The Starling (Oxford University Press, 1984).
2. Cabe, P. R. European Starling (Sturnus vulgaris), version 1.0. In Birds of the World (ed. Billerman, S. M.) (Cornell Lab of Ornithology, 2020).
3. Rosenberg, K. V. et al. Decline of the North American avifauna. Science 366(6461), 120–124 (2019).
4. Bitton, P. P. & Graham, B. A. Change in wing morphology of the European starling during and after colonization of North America. J. Zool. 295(4), 254–260 (2015).
5. Leck, C. F. Avian Introductions Naturalized Birds of the World (Christopher Lever, 1988).