Article says there are 600–3000 penguins per colony. Charitably, let’s say the authors studied 15,000 penguins. Total penguin population estimate: 600,000. So t

Article says there are 600–3000 penguins per colony. Charitably, let’s say the authors studied 15,000 penguins. Total penguin population estimate: 600,000. So this survey counted at most 2.5% of all penguins by reasonable estimates. “Not a single emperor penguin chick survived” seems unsupported.