Almost half of bird species are in decline due to human-made threats, report finds

Almost half of the world's bird species are in decline and one in eight species is threatened with extinction, according to the latest State of the World's Birds report published by BirdLife International.

Birds tell us a lot about the state of the environment and the health of the planet, so the report calls for swift action to protect bird species that are being threatened by climate change, agricultural expansion, invasive species (like domesticated cats), logging, and hunting.

Here & Now's Lisa Mullins talks to Stuart Butchart, a chief scientist at BirdLife International and a co-author of the report.