North America Has 3 Billion Fewer Birds Than it Did in 1970
North America Has 3 Billion Fewer Birds Than it Did in 1970
Population reductions in species such as sparrows and blackbirds reflect a concerning pattern of declining biodiversity across the continent, researchers find.
North America Has 3 Billion Fewer Birds Than it Did in 1970
North America Has 3 Billion Fewer Birds Than it Did in 1970

Population reductions in species such as sparrows and blackbirds reflect a concerning pattern of declining biodiversity across the continent, researchers find.

Population reductions in species such as sparrows and blackbirds reflect a concerning pattern of declining biodiversity across the continent, researchers find.

birds
Squirrels Listen to Birdsong for Safety Cues
Squirrels Listen to Birdsong for Safety Cues
Emily Makowski | Sep 5, 2019
Eastern gray squirrels appear to ease up on vigilance behavior when the birds sound calm.
Bar-Headed Geese Slow Their Metabolism to Soar over Everest
Bar-Headed Geese Slow Their Metabolism to Soar over Everest
Nicoletta Lanese | Sep 4, 2019
The birds also decrease their heart rate and chill their blood to maintain flight in hypoxic conditions.
Unhatched Gulls Shake Their Shells to Warn Siblings of Danger
Unhatched Gulls Shake Their Shells to Warn Siblings of Danger
Nicoletta Lanese | Jul 23, 2019
The unborn chicks translate auditory alarms from adult birds into quaking vibrations.
Image of the Day: Digital Adaptation
Image of the Day: Digital Adaptation
Chia-Yi Hou | Jul 15, 2019
A bird leg with one super-long toe is something paleontologists say they’ve never seen before.
Image of the Day: Close Encounters
Image of the Day: Close Encounters
Chia-Yi Hou | Jun 19, 2019
Watch a hawk close in on a target.
Image of the Day: Baby Steps
Image of the Day: Baby Steps
Chia-Yi Hou | May 28, 2019
Watch young birds move like rock climbers.
GPS-Tagged Seabirds Track the Tides
GPS-Tagged Seabirds Track the Tides
Jef Akst | Mar 1, 2019
Birds drifting on the surface of the sea could provide valuable data for oceanographers.
Image of the Day: Cellular Tracks
Image of the Day: Cellular Tracks
Carolyn Wilke | Jan 21, 2019
To study the fate of stem cells in developing chick embryos, researchers trace their steps over time.
Image of the Day: Fight Club
Image of the Day: Fight Club
Carolyn Wilke | Jan 11, 2019
South American hummingbird males were caught on camera poking and pinching each other with bills adapted for fighting.