Archive for the ‘Bird Protection’ Category

In a Bird’s Nest, an Animal Behavior Puzzle

December 11, 2013

From The New York Times

Sometimes the scientists who study animal behavior solve puzzles and other times they uncover new ones. The war between mockingbirds and cowbirds is a case in point.

Cowbirds are brood parasites, meaning they lay their eggs in the nests of other bird species, thus unloading the messy and demanding business of chick-rearing. They also peck holes in the eggs of the host birds, destroying as many as they can.

Mockingbirds are a favorite target of this plan, and it seems to make perfect sense for them to viciously attack cowbirds when they catch them in the nest.

But when Ros Gloag, then a doctoral student at Oxford, and her colleagues in Argentina looked closely at the war between chalk-browed mockingbirds and shiny cowbirds, they found something unexpected, as they reported in the November issue of Animal Behaviour.

They stationed small video cameras near the nests of 40 pairs of chalk-browed mockingbirds. Over two breeding seasons they recorded more than 200 attacks on intruding cowbirds.

They were surprised to find that these attacks, which their videos show to be quite vicious, did not stop the cowbirds from laying eggs. The cowbirds would hunker down and let the much large mockingbirds deliver hammer blows to the head, but in matter of seconds they would lay an egg and flee.

How could such a failed strategy persist in evolution?

The answer, according to Dr. Gloag, now a postdoctoral researcher at Australian National University, was that the attacks did prevent the cowbirds from carrying out the second prong of their plan, destroying the mockingbird eggs already in the nest.

So the mockingbirds managed to save some of their offspring. They still end up raising unwanted baby cowbird guests. But, said Dr. Gloag, once the eggs hatch, the larger mockingbird chicks compete very well with the smaller cowbirds.

PERMALINK + VIDEO: The New York Times

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10 Ways to Help Migratory Birds

December 2, 2013

From the National Wildlife Federation

ImageFrom the American Bird Conservancy: top 10 things you can do in your home or yard to help declining migratory birds

The American Bird Conservancy (ABC) often gets asked how people can help birds during this time of year. Toward that end, ABC has identified the top ten things people can do to aid or protect migratory birds in their homes and yards.

1.  Keep your cat indoors—this is best for your cat as well as the birds, as indoor cats live an average of three to seven times longer. Even well fed cats kill birds, and bells on cats don’t effectively warn birds of cat strikes. For more information, go to http://www.abcbirds.org/cats.

2.  Prevent birds from hitting your windows by using a variety of treatments to the glass on your home—check out ABC’s tips at http://www.abcbirds.org/abcprograms/policy/collisions/glass.html

3.  Eliminate pesticides from your yard—even those pesticides that are not directly toxic to birds can pollute waterways and reduce insects that birds rely on for food.

4.  Create backyard habitat—if you have a larger yard, create a diverse landscape by planting native grasses, flowers, and shrubs that attract native birds. You will be rewarded by their beauty and song, and will have fewer insect pests as a result.

5.  Donate old birdwatching equipment such as binoculars or spotting scopes to local birdwatching groups—they can get them to schools or biologists in other countries who may not have the resources they need.

6.  Reduce your carbon footprint—use a hand-pushed or electric lawnmower, carpool, use low energy bulbs and Energy Star appliances. Contact your energy supplier and ask them about purchasing your energy from renewable sources.

7.  Buy organic food and drink shade-grown coffee—increasing the market for produce grown without the use of pesticides, which can be toxic to birds and other animals, will reduce the use of these hazardous chemicals in the U.S. and overseas. Shade coffee plantations maintain large trees that provide essential habitat for wintering songbirds.

8.  Keep feeders and bird baths clean to avoid disease and prevent mosquitoes from breeding.

9.  Support bird friendly legislation both locally and in the U.S. Congress.

10.  Join a bird conservation group—learn more about birds and support important conservation work.

According to ABC, birds need our help now more than ever.  In addition to the ongoing threat of loss of habitat that is becoming magnified by global warming, millions of birds are directly killed due to a number of different human-related causes.
Scientists estimate that 300 million to 1 billion birds die each year from collisions with buildings. Up to 50 million die from encounters with communication towers.  At least 11 million die from car strikes.  Another 1 million may die each day from attacks by cats left outdoors.

Some of these deaths occur year-round but many occur during the peak spring and fall migrations. Some studies suggest that perhaps as many as half of all migrating birds do not make it back to spring and summer grounds, succumbing to various threats on either end of the journey.

“Protecting and helping birds is not only the right thing to do, it is also good for the economy and the future of our environment. Birds are invaluable as controllers of insect pests and as pollinators of crops, and also generate tremendous economic revenues through the pastimes of bird feeding and birdwatching,” says ABC President George Fenwick.

A recent federal government study reports that over 20 percent of the U.S. population – 48 million people – participates in birdwatching.  Of that total, about 42 percent (20 million people) actually travel to see birds. Birders spend about $36 billion annually in pursuit of their pastime.  The top five birdwatching states by percentage of total population are: Montana (40%); Maine (39%); Vermont (38%); Minnesota (33%); and Iowa (33%).

Photo of Scarlet Tanager by Brian Tang

PERMALINK: National Wildlife Federation

Brazilian Logger Turned Birder Aims to Turn His Community into Bird Sanctuary

December 2, 2013

From SustainableTrip.org

sustainableTripIn the heart of the Brazilian Amazon is the Rio Negro Sustainable Development Reserve, an area that is rich in biodiversity and home to several small communities that depend on natural resources for a living. Pousada Garrido is the only hotel in the Tumbira region, and it is owned by a former logger and community leader named Roberto Mendonça.

Pousada Garrido has become a source of income for Mendonça as well as several other local families who offer tourism services to visitors. The inn also uses solar energy (as does the entire community), recycles, supports local artisans with reusable materials, and purchases foods from local producers. This year, Pousada Garrido earned Rainforest Alliance verification for sustainable tourism.
Tourists are drawn to Tumbira for the richness and exuberance of its forests, including the many bird species that abound there.

Mendonça partnered with a local tour guide named Cleudilon, whose nickname is Passarinho, or “little bird” in Portuguese, because he can perfectly imitate 32 types of birds! (Scroll down to see an awesome video of Cleudilon calling to birds in the forest.) The two recently undertook a project to make the inn into a perfect site for bird watching. And you can help make it happen! Visit the community’s crowdfunding page, to help them turn Tumbira into a community-based ecotourism center.

Paula Arantes of Garupa, the NGO helping Mendonça and Cleudilon raise money for the project, tells us more about the initiative.

Question: What is the plan for the money you hope to raise?
Paula Arantes: Roberto and Cleudilon want to turn their community into a birding and community tourism center. To get started, they intend to adapt the infrastructure of Pousada Garrido to sustainably accommodate more guests and provide what is needed for birding. They also want to publish a guide to the local birdlife as a reference for tourists and an educational resource for the children of the community.

Q: Why are Tumbira and Pousada Garrido such special places for bird watching?
Arantes: Though you can see birds everywhere in Amazon, Tumbira is special because its pathways make it easy to see many varieties of birds, and the area is easily accessible by land or by boat. Furthermore, Cleudilon’s incredible talent for imitating birds and really enhances the birding experience.

Q: What do you need to carry out the project?
Arantes: Investments need to be made to expand the inn without negatively impacting the environment. More equipment is also needed for bird watching, and Cleudilon needs resources to develop the bird guide. The goal is to raise around US$8,800 (20,000 Brazilian reales) to help cover building materials, labor, the development of the guide, and more.

Q: What progress has been made so far?
Arantes: Thanks to the Rainforest Alliance verification process, we’ve identified the appropriate areas for making investments and improvements in a sustainable way.

Q: How does this project benefit the community?
Arantes: More tourists means more sustainable income for the residents! Supporting community-based tourism is one of the best ways for travelers to ensure that their vacation is sustainable.

Q: How can people help?
Arantes: On the project page on the Garupa website, you can find more details about the initiative and make an online donation to co-finance this effort. Donors receive tokens of appreciation, such as photographs, the bird guide, and even stays at the inn, depending on the amount contributed. Donating any amount, no matter how small, and sharing our project with your friends and family is the best way to make Roberto’s dream a reality!

PERMALINK: sustainabletrip.org

An Earlier Exodus Amid Climate Change

December 2, 2013

From The New York Times

godwit-NYTimesBirds are migrating earlier and earlier each year, and scientists have long suspected that climate change is responsible. A new study by researchers at the University of East Anglia in England shows that individual birds migrate like clockwork, but nesting and hatching are happening earlier as a result of warmer temperatures, and this appears to be linked to the advancing of overall migration patterns.

PERMALINK: The New York Times

Five Rare South American Bird Species Given U.S. Endangered Status

December 2, 2013

From The Center for Biological Diversity | biologicaldiversity.org

SAN FRANCISCO— In response to decades-old listing petitions and a series of lawsuits by the Center for Biological Diversity, the U.S. Fish and Wildlife Service today designated four rare bird species from Colombia (the blue-billed curassow, brown-banded antpitta, Cauca guan and gorgeted wood-quail) and one Ecuadorian hummingbird species (Esmeraldas woodstar) as endangered under the U.S. Endangered Species Act.

“Protecting these vulnerable tropical birds under the Endangered Species Act will give them a better shot at survival and attract attention to the urgent need to protect their remaining forest homes,” said Jeff Miller, a Center conservation advocate. “Tropical deforestation is threatening to drive so many of the planet’s most amazing birds extinct.”

A campaign to protect scores of the world’s most imperiled bird species began in the 1980s, when worried ornithologists began submitting Endangered Species Act petitions to protect more than 70 international bird species. Although the Fish and Wildlife Service had determined by 1994 that most of the species warranted protection, the agency never responded to the listing petitions. After a quarter-century, legal protection had been provided for only a handful of the species, and at least five of the 73 had gone extinct.

The Center filed lawsuits in 2004 and 2006 that jump-started the foreign-species listing program. The Service then determined that more than 50 of the bird species warranted listing. So far 36 of the bird species have been protected as endangered or threatened.
Listing international species under the U.S. Endangered Species Act restricts buying and selling of the imperiled animals, increases conservation funding and attention, and can add scrutiny to development projects proposed by U.S. government and multilateral lending agencies — such as the World Bank — that would destroy or alter habitat.

Background

The blue-billed curassow (Crax alberti) is the world’s most threatened species of cracid, a family of beautiful crested game birds found primarily in Latin America. This large, mainly black bird is the only curassow with distinctive blue bill ornaments, earning the species its common name. Very little is known about this bird in the wild due to its rarity; while at one time its range stretched 41,000 square miles, it’s now restricted to only a fragmented, 806-square-mile forest area in northern Colombia. It has been severely hurt by a rapid increase in deforestation over the past decade through agriculture and other industries. About 98 percent to 99 percent of this amazing bird’s habitat has been lost, and there are thought to be fewer than 2,000 individuals left.

The brown-banded antpitta (Grallaria milleri), like other antpittas, is a secretive bird with a low population density and high habitat specificity — a nearly flightless, ground-dwelling species found only in the Neotropics. This antpitta, endemic to the central Andes of Colombia, has been severely harmed by a rapid increase in deforestation due to agriculture and human encroachment. In 1992 researchers considered it locally extinct, if not extinct throughout its range. Although it was rediscovered in 1994, there are thought to be only a few hundred brown-banded antpittas remaining in four isolated populations.

The Cauca guan (Penelope perspicax) is a rare forest bird found only on the west slopes of the west and central Andes of Colombia. This large, mainly brown-gray bird is similar in appearance to a turkey, thanks to its thin neck and small head with a dewlap — a flap of skin that hangs beneath the lower jaw or neck. The Cauca guan requires large territories for foraging, but today it’s relegated mainly to small patches of forest, since most of its preferred dry-forest habitat has been eliminated and is highly fragmented. The species’ range has been reduced by 95 percent since the 1950s as a result of agriculture production and human settlement. Historically, this magnificent bird was considered common; now it is thought that only 250 to 1,000 Cauca guans are in existence.

The gorgeted wood-quail (Odontophorus strophium) is a small, secretive, ground-dwelling bird endemic to montane subtropical forests on the west slope of the eastern Andes, in the Magdalena Valley of Colombia. The species has declined due to deforestation from logging, conversion of forests to agriculture, coca growing and drug eradication efforts using herbicides. Fewer than 500 of these ‘‘forest partridges’’ are now believed to remain, in fragmented habitats.

The Esmeraldas woodstar (Chaetocercus berlepschi) is a tiny, mysterious hummingbird with striking violet, green and white plumage, endemic to Ecuador. Little is known about this range-restricted, forest species, as it seems to disappear from known locations during nonbreeding months. Its preferred evergreen forest environment is one of the most threatened forest habitats in the Neotropics. The remaining habitat for the species has been reduced by 99 percent and is severely fragmented due to rapid deforestation as a result of logging and agriculture clearance. The Esmeraldas woodstar was thought to be extinct until it was rediscovered in 1990 — after not being sighted since 1912.

Read about the Center’s International Birds Initiative.

The Center for Biological Diversity is a national, nonprofit conservation organization with more than 625,000 members and online activists dedicated to the protection of endangered species and wild places.

PERMALINK: biologicaldiversity.org


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