Friday, October 24, 2014

Loose Feathers #466

Say's Phoebe / Photo by Tom Koerner (USFWS)
Birds and birding
Science and nature blogging
Environment and biodiversity

Friday, October 17, 2014

Loose Feathers #465

Ruby-crowned Kinglet / Photo by Tom Koerner/USFWS
Birds and birding
Science and nature blogging
Environment and biodiversity
  • There is some disagreement over whether the EPA's preferred solution to the Passaic River's pollution is the right approach.
  • A site in New Mexico is releasing huge amounts of methane (a potent greenhouse gas) into the atmosphere.
  • Conservation groups are suing to list the wolverine as a threatened species. The main threat to the wolverine is climate change, which will limit breeding habitat for the species.

Friday, October 10, 2014

Loose Feathers #464

Mew Gull / Photo by Kristine Sowl (USFWS)
Birds and birding news
Science and nature blogging
Environment and biodiversity
  • In November, voters in New Jersey will decide on a ballot measure to dedicate a portion of the corporate business tax to open space acquisitions. Some environmentalists and policy wonks think this is a bad idea.
  • President Obama will declare a portion of the San Gabriel Mountains a national monument.
  • New York plans to restore habitat around many of the lakes and ponds in its city parks.
  • The marsh boardwalk trail reopened at De Korte Park for the first time since Sandy.

Friday, October 03, 2014

Loose Feathers #463

Tundra Swan at Yukon Delta NWR / USFWS
Birds and birding
  • With warmer temperatures and less sea ice in the Arctic, polar bears are forced to spend more time on land, where they are now hunting Snow Geese in greater numbers. Researchers are trying to figure out how this affects the geese and other aspects of Arctic ecosystems.
  • Studies of common birds can be beneficial for protecting rare species.
  • Plans for an Ivanpah-like solar development in California have been stopped for now because of concerns about the toll Ivanpah is taking on migratory birds. 
  • The western population of Yellow-billed Cuckoo will be listed as threatened under the Endangered Species Act. While cuckoos in the east are common, western cuckoos face threats to their breeding habitat from agriculture, changing hydrology, and climate change.
  • Steamer ducks are notoriously aggressive.
Science and nature blogging
Environment and biodiversity

Friday, September 26, 2014

Loose Feathers #462

Sooty Terns / USFWS Photo
Birds and birding news
Science and nature blogging
Environment and biodiversity

Friday, September 19, 2014

Loose Feathers #461

Cinnamon Teal / Photo by Tom Koerner/USFWS
Birds and birding
  • Monk Parakeets most likely arrived in New York City via the pet trade but have thrived in the urban outdoors.
  • A recent study found that captive Monk Parakeets usually group in pairs but also have complex interactions with other members of the larger flock.
  • One problem revealed in the State of the Birds report is that many birds of arid lands are in decline while birds that use wetlands have largely improved thanks to conservation.
  • Scientists are looking for members of the public to help document penguin behaviors by looking at images online at Penguin Watch.
Science and nature blogging
Environment and biodiversity

Friday, September 12, 2014

Loose Feathers #460

Wilson's Warbler / Photo credit: Tom Koerner/USFWS
Birds and birding news
Science and nature blogging
Environment and biodiversity

Friday, September 05, 2014

Loose Feathers #459

Loggerhead Shrike / Photo by Tom Koerner/USFWS
Birds and birding news
Science and nature blogging
Environment and biodiversity

Monday, September 01, 2014

Passenger Pigeons and Conservation

Martha in 1911. From Arbor Day and Bird Day (1922).
Today marks the 100th anniversary of the death of Martha, the last Passenger Pigeon. Martha likely hatched in captivity sometime in the 1880s and at some point landed in a small collection of Passenger Pigeons at the Cincinnati Zoo. In 1910, she became the last pigeon left in their collection, and by her death in 1914, she was the last known Passenger Pigeon in captivity or in the wild.

In truth, Passenger Pigeons had been extinct in the wild for some time. The last recorded sighting was a wild pigeon shot in Ohio in 1900. By then the species had already been scarce for about a decade.

This was all the more shocking because Passenger Pigeons had once been so abundant, with a total North American population numbering in the billions. Early ornithologists such as John James Audubon remarked on the vast migratory flocks that could take days to pass. The pigeons bred around the Great Lakes region in vast communal nesting colonies. As late as the mid-19th century, Passenger Pigeons were still abundant. However, changes in technology made it easier for market hunters to locate flocks and nesting colones and ship thousands of carcasses to cities for sale as food.

The rapid decline and extinction of the Passenger Pigeon that followed was one of several events that inspired the early conservation movement. Federal laws such as the Lacey Act of 1900 and the Migratory Bird Treaty Act of 1918 were too late to help the Passenger Pigeon but have protected other birds since then. They, along with the Endangered Species Act, can continue to protect birds (and other wildlife) as long as their protections remain in place and are enforced. The anniversary of Martha's death should serve as a reminder that no matter how secure or abundant a species may appear, it can disappear rapidly under the right combination of circumstances.

Some links on Passenger Pigeons:

Friday, August 29, 2014

Loose Feathers #458

Mountain Bluebirds / Photo by Tom Koerner/USFWS
Birds and birding
  • The presence of mercury in the environment appears to alter the songs of songbirds, in addition to the other ways it harms birds.
  • Iceland's seabird nesting colonies have been decimated by a series of widespread breeding failures, much like seabird colonies in North America.
  • Some readers may have seen a graphic that compared the number of bird fatalities from various energy sources. There are a number of problems with this graphic. For example, it does not account for things like each source's relative share of the energy market. Another significant problem is that fatalities among some species are more significant than others due to their relative rarity. The wildlife harms caused by renewable energy sources should be minimized now before more massive wind and solar plants are built and cause even more bird deaths.
  • The US Fish and Wildlife Service recently changed its interpretation of several provisions in the Endangered Species Act in ways that could undermine protection for species that have lost significant chunks of their historical ranges or are only threatened in part of their range.
  • Salvage logging will proceed in areas burned by the Rim Fire in 2013 even though Spotted Owls have moved into some of the burned areas, which are also important habitat for other birds such as the Black-backed Woodpecker.
  • A genetic study of Wilson's Warblers found that there are six distinct North American breeding populations, one in the east and five in the west. The study was also able to tie these breeding populations to specific wintering grounds and migration routes.
  • Many African vultures have been deliberately poisoned because they alert wildlife agents to the carcasses of poached elephants.
  • When Northern Gannets search for food, they look especially for places where currents meet or upwelling occurs.
  • A court in North Carolina upheld the protection of beach nesting habitat from off-road vehicles at Cape Hatteras.
  • The DC Snowy Owl was found dead in Minnesota this summer.
  • Common Ravens have continued their invasion of New York City with a possible nest in Manhattan.
  • The Madagascar Pochard needs a different wetland for nesting.
  • Many birds are exposed to conjunctivitis, but only a few species get sick from it.
  • The communal nests of Sociable Weavers can grow to massive proportions.
Science and nature blogging
Environment and biodiversity