North America

Polar bears facing ‘worst-case trajectory’ because of climate change

Canada's Arctic islands could be ice-free for months each year by the end of the century, triggering starvation and reproductive failure.

26 November 2014

Hope for Monarch Butterfly after Mexican Logging Halted

When millions of monarch butterflies take to the sky and fly thousands of kilometres from the United States and southern Canada to Mexico, the view is breathtaking.

24 November 2014

Polar bear population in parts of Alaska, Canada down by 40 percent

Beaufort Sea hosts one of four polar bear populations considered to be on the decline among 19 worldwide.

18 November 2014

Migrating monarchs are ‘buffer’ than the rest

New research traces the evolutionary origins of monarchs to North America, instead of South America as was previously hypothesized, and identifies a gene related to the butterfly’s distinctive oran

08 October 2014

Schmetterlings-Gene: Die wundersame Wanderung der Monarchfalter

Ende Oktober kommt es in Mexiko zu einem einzigartigen Naturschauspiel: die Ankunft der Monarchfalter.

01 October 2014

Mass murder by botulism: invasive species drive bird-death surge

LELAND, Michigan—A midsummer overcast lifts as Lake Michigan changes from inky black to a deep blue-green.

18 September 2014

North America's key birds facing extinction, study finds

314 species, including the bald eagle and 10 state birds of US at risk from climate change

09 September 2014

California blue whales bounce back to near historic numbers

Researchers believe that California blue whales have recovered in numbers and the population has returned to sustainable levels.

05 September 2014

Vor 100 Jahren starb die letzte Wandertaube: Marthas einsamer Tod

Im 19. Jahrhundert verdunkelten Schwärme aus Millionen Wandertauben den Himmel über Nordamerika. Vor 100 Jahren starb das letzte Exemplar in einem Zoo.

02 September 2014

Puget Sound's endangered killer whales continue decline

Number of whales drops to 78, a figure not seen since 1985, with two deaths this year and no new calves since 2012

31 August 2014