Context:

• The second largest Emperor penguin colony in the world has suffered a “catastrophic” breeding failure after nearly all chicks born over three years died as their icy Antarctic habitat shrinks.
• The British Antarctic Survey (BAS) used satellite imagery to study the behaviour of the Halley Bay colony in the Weddell Sea due south of Cape Hope, which normally sees up to 25,000 penguin pairs mate each year.
• They found that in 2016, when abnormally warm and stormy weather broke up the sea-ice on which the penguins normally raise their young, almost all the chicks died.