Abstract

This study examines the population dynamics and spatial distribution of Arctic Terns in two tourist sites in Iceland’s Westfjords: Vigur Island and Súðavík. In 2023, counts revealed 458 terns in Súðavík and 991 in Vigur. We propose a monitoring approach using photography to estimate the population, including non-breeders. Additionally, an interspecies interaction was observed in Vigur, where terns appear to be relocating towards the puffin colony. This behaviour is hypothesised to serve as a defence mechanism against predators, utilising the puffins’ frequent, low-altitude flights, as a protective ceiling.

Recommended citation: Miles-Gaches, D. P., & Lhériau-Nice, A. (2025). A photographic approach to monitor spatial dynamics and population trends of Arctic Tern colonies in two touristic bird watching spots in the Westfjords, Iceland. Avocetta<\i>, 49. https://doi.org/10.30456/avo.28523
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