During the early 1800s, wood bison numbers were estimated at 168,000, but by the late 1800s, the subspecies was nearly eliminated.
Excessive hunting was the primary factor leading to population decline. Another factor that is thought to have played...
Wood bison are the largest native land mammals in the Western Hemisphere, 10 to 15% heavier than plains bison. Bulls are slightly larger than cows and average around 1,800 pounds, but can get up to 2,000 pounds. Both males and females have short...
Birdwatching; Estuarine environments; Wetlands; Youth; Connecting people with nature; Wildlife refuges; Children;
A young birder gazes out over a marsh area on the Humboldt National Wildlife Refuge. Humboldt Bay National Wildlife Refuge is located on Humboldt Bay on the northwest California coast. The refuge has two main purposes: to protect and enhance...
The Sacramento National Wildlife Refuge is located near Willows, CA and is one of California's premier waterfowl refuges. Waterfowl are present from September through March. View hundreds of thousands of geese and ducks from November through...
Cypress Tree Knees on the Little River National Wildlife Refuge. Cypress knees are a distinctive feature of the root system of cypress trees, though their function is unknown.
Arroyo Toad in hands to demonstrate size. This small, buff colored toad has a soft, high whistled trill that is often mistaken for the call of an insect. It was listed as endangered in 1994.
A controlled burn on Deep Fork National Wildlife Refuge. Controlled burn is a technique used in habitat management. Fire is a natural part of forest and grassland habitats and serves an important role.
