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Ecological Studies of Wolves on Isle Royale 2025-2026

In winter 2026, the wolf population was likely composed of 37 wolves, which is approximately 20 percent higher than the last population estimate of 31 wolves in 2023. The wolf population included three packs, each containing at least 10 wolves. … read more

2024-2025 Greater Voyageurs Ecosystem Wolf Population Report

During April 2024–April 2025, we studied the wolf population in the Greater Voyageurs Ecosystem (GVE), Minnesota to understand wolf population dynamics and how changes in population dynamics are connected to or influence predation behavior, wolf pup survival, and changes in … read more

National Wolfwatcher Coalition Announces 2025 Wolf Education Mini-Grants Available

We are proud to announce that we will again be awarding mini-grants for wolf education and includes the promotion of non-lethal measures to minimize wolf conflicts. Due date for submission is July 31, 2025  and will be awarded in the amount … read more

Intrinsic and environmental drivers of pairwise cohesion in wild Canis social groups

Animals within social groups respond to costs and benefits of sociality by adjusting the proportion of time they spend in close proximity to other individuals in the group (cohesion). Variation in cohesion between individuals, in turn, shapes important group-level processes … read more

The pulsed effects of reintroducing wolves on the carnivore community of Isle Royale

Large carnivores are being globally reintroduced with the goal of restoring ecological interactions. However, the extent that competitive interactions are restored within communities is often unclear. In a before–after study within Isle Royale National Park (in the US state of … read more

Isle Royale’s Old Gray Guy: How One Wolf Impacted an Entire Ecosystem

The male wolf’s arrival via ice bridge in 1997 changed everything. On the heels of co-authoring a study in Science Advances, Isle Royale wolf-moose study co-leader Sarah Hoy explains how he triggered a series of knock-on events that impacted the … read more

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