LIMA (Reuters) -Scientists along Peru's central Pacific coast are sounding the alarm that more action is needed to protect seabirds, sea lions, and penguins as climate change, disease, and overfishing threaten their survival. Research shows the number of guano birds has dropped by more than three-quarters in the past three years to around 500,000, according to local biologists, down from a population of 4 million in 2022. "We are very alarmed by this sharp decline," said Susana Cardenas, director of the Environmental Sustainability Center at Peru's Cayetano Heredia University in an interview with Reuters.