Images

Clay-colored sparrow nest.

North American Bird Phenology Program Coordinator Jessica Zelt working with old migration bird cards.

Little blue herons are a species recorded in the historical bird phenology cards.

Yellow-headed blackbird fledgling. This species is also recorded in the Bird Phenology Program cards.

Volunteers Derek Smith (white shirt) and Reuben Anderson sort through migration cards in the Bird Phenology Program Office.

Black-tailed prairie dogs are quite susceptible to sylvatic plague, but a new plague vaccine put in their food shows significant promise in the laboratory. The prairie dogs transmit the disease to endangered black-footed ferrets, who eat the prairie dogs and are also quite susceptible to the disease.

Researchers implant a radio transmitter in a 16-foot, 155-pound female Burmese python (Python molurus) at the South Florida Research Center, Everglades National Park. Radio-tracking builds understanding of where pythons spend their time and therefore where they can be controlled in practice. Photo courtesy of Lori Oberhofer, National Park Service.

Burmese python (Python molurus). Photo courtesy of Roy Wood, National Park Service.

Southern African Python (Python natalensis). The snake pictured is a representative of a species discussed in the USGS snake risk assessment. This snake was photographed in its native range.

Green anaconda in Brazil. The snake pictured is a representative of a species discussed in the USGS snake risk assessment. This snake was photographed in its native range.

Yellow anaconda in Argentina. The snake pictured is a representative of a species discussed in the USGS snake risk assessment. This snake was photographed in its native range.

Deschauensee's Anaconda (Eunectes deschauenseei). The snake pictured is a representative of a species discussed in the USGS snake risk assessment. This snake was photographed in its native range.

Beni or Bolivian Anaconda (Eunectes beniensis). Photo by Lutz Dirksen, www.anakondas.de. Used with permission.

Reticulated python (Broghammerus/Python reticulatus) in Indonesia. Photo ©Bjorn Lardner, Colorado State University. Used with permission.

Boa Constrictor (Boa constrictor) at a county park in southeastern Miami. Photo courtesy of Mike Rochford, University of Florida. Used with permission.

A female Burmese python (Python molurus) on her nest with eggs. Photo by Jemeema Carrigan, University of Florida. Courtesy of Skip Snow, National Park Service. Used with permission.

Yellow anaconda (Eunectes notaeus) specimen captured at Big Cypress National Preserve. Photo courtesy of Skip Snow, National Park Service.

A Burmese python (Python molurus) peeks over the head of an alligator that holds the python's body in its mouth in Everglades National Park. Photo courtesy of Lori Oberhofer, National Park Service.

A closeup of the Fosheim Peninsula on central Ellesmere Island where the wolf, Brutus, was radio-tagged.

Massachusetts inner continental shelf bottom photograph showing seafloor life.

Massachusetts inner continental shelf bottom photograph showing seafloor life.