Mexico’s wintering monarchs drop by half
Monarch butterfly populations wintering in Mexico have declined 53% since last season, according to recent surveys. Biologists use the acreage of forest they occupy ...
Mexico
JWM: Museums hold secrets of California’s vanished pronghorn
One hundred years ago, pronghorn roamed the Sonoran Desert in what is now the borderlands between Southern California and northern Baja California in Mexico. Today, ...
Researchers say Mexican ranch likely source of Ariz. ocelots
A breeding population of ocelots just 30 miles south of the border is likely the source of occasional cat sightings in Arizona, biologists say. The population is ...
President Gary White promotes TWS at Mexico gathering
After appearing at the National Conference of Wildlife Management and Conservation in Mexico, current TWS President Gary White and Fidel Hernández, president-elect ...
Geolocators yield conservation clues for migratory birds
Tiny geolocators attached to the backs of golden-winged warblers have shed new light on their migrations and revealed a part of the globe that could be critical to ...
Mexican government shrinks funding for science
Government-funded scientific efforts in Mexico are facing significant cutbacks. To free up funds for poverty-alleviation programs, the federal government is cutting ...
Watch: Temperature drives internal clock for monarchs
When monarch butterflies overwinter in central Mexico and along the California coast, they spend much of the time dormant to help with their winter survival before ...
JWM: Are black brant numbers going up — or down?
To judge by the annual surveys, black brant (Branta bernicla nigricans) are on the upswing. After years of decline, aerial counts along their migration routes — ...
Translocated Nevada hawk moves on to Mexico
As a Wildlife Services airport biologist working at Naval Air Station Fallon in Nevada, I recently heard from an enthusiastic birder, Tony Thacker, who had spotted ...
Watch: Tracking the monarchs to Mexico
Before the 1970s, where monarch butterflies overwintered was a mystery. Then researchers succeeded worked with Mexicans to trace the migration to the hills of ...