After decades of frustration, machine-learning tools are unlocking a treasure trove of acoustic data for ecologists.

Embarking for their daily visit to look for birds at Portage Park in Sturgeon ... a species common in Europe and Asia but rarely found in North America. The Dec. 28 sighting of the white wagtail ...

This species is one of the most widely distributed, abundant, well-known, and well-named birds in North America. Polytypic. Length 8.7". Usually sits in an obvious place or is found in flocks ...

Bald eagles are native to North America. Bird watchers can spot them in most states, and Alaska is home to the largest eagle ...