Peter P. Marra – The Conversation

The spoon-billed sandpiper, a small wading bird, flies nearly 5,000 miles (8,000 km) on its annual migration. Tareq's Photography/Wikimedia

July 23, 2026

More than half of Earth’s migratory bird species are declining – here’s how we can still save them

Peter P. Marra, Georgetown University and Nathan W. Cooper, Smithsonian Institution

A new global assessment of the world’s migratory species finds reason for alarm, but also hope – and a road map for helping them survive.

Les chats qui vagabondent chassent, interagissent avec la faune sauvage ou d'autres animaux domestiques, et évoluent dans des environnements contaminés par des agents pathogènes et des toxines. (Unsplash/Oscar Fickel)

June 12, 2026

Comment éviter que votre chat ne devienne un vecteur de maladies

Amy Wilson, University of British Columbia; Peter P. Marra, Georgetown University, and Scott Wilson, University of British Columbia

Réfléchir aux déplacements extérieurs de votre chat peut contribuer à préserver la biodiversité, le bien-être animal et la santé publique.

Roaming cats hunt, interact with wildlife or other domestic animals, and move through environments contaminated with pathogens and toxins. (Unsplash/Oscar Fickel)

June 7, 2026

How you can stop your cat from bringing home unwelcome pathogens

Amy Wilson, University of British Columbia; Peter P. Marra, Georgetown University, and Scott Wilson, University of British Columbia

Thinking about how and where your cat roams outdoors can help safeguard biodiversity, feline and wildlife welfare and public health.

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