This research examined how birds’ nests, specifically those of Marsh harriers, can harbor dangerous fungi that could affect both wildlife and humans. The study found that these nests contain large numbers of potentially harmful fungi that could cause diseases in plants, animals, and humans. Impact on everyday life: • Highlights potential health risks for people living or working near wetland areas where these birds nest • Demonstrates how wildlife habitats can serve as reservoirs for disease-causing organisms • Shows the importance of proper protective measures when handling or working near bird nests • Helps understand the spread of fungal diseases in agricultural areas near wetlands • Provides insights for better wildlife management and public health practices