Archive for March 2010

Prairie Chicken #4: Attwater’s Prairie Chicken Nesting

Posted by Peter in Animal Origins & Fun Facts,Endangered Species,Texas

The Attwater’s Prairie Chickens begin nesting in March.  The hens make a depression in the ground filled with grass and feathers under the cover of tall grass clumps to create their nests.  Hens typically begin laying their eggs in late March.

The Attwater’s Prairie Chicken eggs are light tan to light green in color.   The average hen lays a clutch of about 12 eggs.  Once all of the eggs are laid, the hen will begin incubating the eggs.  The incubation period is about 26 days long.  The nests often fall victim to predators such as snakes, fire ants, and hawks; heavy rains can also pose a threat to the success of a nest.  The chicks hatch covered in bright yellow feathers with patches of brown and black.  In the wild, chicks will stay with the hen for about six weeks. 

Attwater's Prairie Chicken Egg

Attwater's Prairie Chicken Egg

At the Houston Zoo, we collect the Attwater’s Prairie Chicken eggs from our captive flock of birds for artificial incubation and hand rearing of the chicks.  This allows us to better protect the eggs from damage and increases the chances of an egg hatching successfully.  Our first Attwater’s Prairie Chicken egg of the 2009 breeding season was laid on March 25, 2009. The hens from our breeding flock at NASA produced 163 eggs in 2009.

Attwater’s Prairie Chicken Post #3 was on 3/16/2009

Year of the Tiger: Extinct Subspecies

Posted by Peter in Featured

Part 7 of our Tiger profile

Three Extinct Subspecies – yes, large mammals which have disappeared forever in the last 50 years.

Bali Tiger Panthera tigris balica, Javan Tiger Panthera tigris sondaica and the Caspian Tiger Panthera tigris virgata.

The Bali Tiger was the first Tiger to be lost in the last half-century, disappearing in the 1940′s. As one could imagine, tigers living on a small island, such as Bali, inhabitated by humans leads to direct conflict and for the most part tigers were considered pests and hunted to extinction. Before we go pointing fingers – North Americans did their best to rid ourselves of wilves, mountain lions and other predators in the late 1800′s and through the 1900′s. Humans clearly have a propensity not to want to share our land with an animal that can eat us – even if the Bali Tiger was reprotedly the smallest of all tigers, it was a tiger and could eat your livestock nonetheless.

The Caspian Tiger was the next to go in the 1970′s. Unlike the isolated isalnd species, the Caspian was found across Turkey and Iran (south and west of of the Caspian Sea) and west through Central Asia into the Takla Makan desert of Xinjiang, China. Hunting, habitat loss and conversion to agriculture were the leading factors in the loss of this tiger. Save the Tiger Fund notes tigers in Central Asia were not usually regarded as a threat to human life and were known to co-exist with human habitation, even close to major towns such as Tashkent. But the spread of settlement, especially Russian immigration into Central Asia from the late nineteenth century, was to lead to their demise. As the riverside vegetation was cleared for cultivation, and rivers tapped for irrigation water, notably for the great expansion in cotton growing from the 1930s, tigers lost their habitat and prey. In Russian Central Asia in the early decades of the twentieth century military detachments were used to exterminate the tigers, as well as leopards and wolves, ahead of human settlement. Herdsmen regarded tigers as a threat to their livestock, including camels, horses and sheep. As their fine pelts were valuable they were killed by strychnine poison and steel traps, and large bounties were paid for their destruction.

The Javan Tiger was the latest to go, in the late 70′s-1980′s. A tiger went extinct in the 1980′s – ~25 years ago, large mammal extinction should not occur in this day and age, yet they do, and will continue to do so. Another island species which was both hunted and lst it’s prey base due to loss of habitat. Hopefully we have learned our lessons with island species and can protect the remaining Sumatran Tigers left on that island before there populations drops below one which is genetically viable.

 

Lecture tomorrow night!

Posted by Peter in Featured,What You Can Do

Photo credit Cristina Mittermeir

Photo credit Cristina Mittermeir

 

Who is not drawn to spectacular imagery? Wildlife, people, landscapes; a good photo is captivating and, many times, offers you an opportunity to learn more about the subject.

On March 25th, the Houston Zoo will be welcoming world class photographer, and Director of the International League of Conservation Photographers, Cristina Mittermeir as part of our Call of the Wild Speaker Series. Come out to enjoy an evening of scrumptious hors d’oeuvres, breathtaking photographs and first-hand stories from conservationists on the frontlines in the battle to help save the world’s wildlife and habitats. Just click on the Call of the Wild link above for ticket information. While you are there, pick up Cristina’s new book The Wealth of Nature on pre-order and pick it up at the lecture.

The International League of Conservation Photographers mission is mission is to translate conservation science into compelling visual messages targeted to specific audiences. We work with leading scientists, policy makers, government leaders and conservation groups to produce the highest-quality documentary images of both the beauty and wonder of the natural world and the challenges facing it.

You may have caught Joel Sartore or Kevin Schafer at one of our previous speaker events – both ILCP members. If you missed them, pop on over to their websites and prepare to be amazed. Another ILCP member, Frans Lanting will be our guest speaker in October 2010.

The Houston Zoo partners with these individuals and organizations because we believe, as ILCP notes, that awe-inspiring photography is a powerful force for the environment. Our goal is to help our visitors enjoy the natural world which surrounds us, whether through a quite stroll through the zoo, or through the lenses of our colleagues.

Photo credit Cristina Mittermeir

Photo credit Cristina Mittermeir

Year of the Tiger: South China Tiger

Posted by Peter in Endangered Species

Part 6 of our Tiger profiles:

South China Tiger Panthera tigris amoyensis

This one is a mess, plain and simple.

Once found in central and eastern China, and numbering close to 4,000 individuals as late as the 1950′s, the government listed the species as a pest and its persecution began. Now, it is believed no more than 20-30 individuals remain although no official or biologist has observed a wild South China Tiger since the 1970′s. The IUCN lists this species as Critically Endangered (Possibly Extinct in the Wild). Regardless, even at 20 individuals, no wild viable population can remain.

Link to http://www.iucnredlist.org/apps/redlist/details/15965/0 and Save the Tiger Fund for more on what could be the latest Tiger to be heading for extinction.

Check back on 3/29 as we profile the 3 subspecies of Tigers which have gone extinct since the 1940′s…

You are going to Love LIFE!

Posted by Rachel in Uncategorized

Last Thursday night I had the distinct pleasure of being one of the lucky few to catch a 1 hour sneak preview of the new Discovery Channel, 11 part wildlife documentary series, LIFE at the Landmark Theater in River Oaks.

If you liked Planet Earth, you are going to love, Life.

The cinematography was beautiful, the animal stories, narrated by Oprah Winfrey, were both educational and humorous in a way only the diva of day time television can deliver.

 The general overview of this part of the series was about amazing animal adaptations, their struggle to survive in a dog eat dog world, and the powerful drive that all living things share, the drive to procreate.

From a band of cheetah brothers teaming up to hunt ostriches, to an up close and personal look at the dedicated parental care of the strawberry dart frog, to capuchins using tools in genius ways to reap the rewards of a hard to crack fruit, to male stalk eyed flies that battle with their googly eyes, the images and stories in Life are truly a breath taking, touching and an intimate look at the individual lives of the amazing and sometimes strange creatures that exist on earth.

Documentaries like LIFE connect people to nature in a way that inspires us to want to preserve the variety of life on this planet, especially when we find that even the smallest creatures on earth are so much like us.

Be sure to check it out this Sunday on the Discovery Channel, you are going to be hooked.

 

LIFE

Year of the Tiger: Bengal Tiger

Posted by Peter in Endangered Species

Part 5 of our Tiger species profiles

Bengal Tiger Panthera tigris tigris

Of all the living tiger subspecies, the Bengal Tiger’s population currently is the highest yet low enough to be considered Endangered. With a population of around 2,500individuals, the Bengal Tiger faces habitat loss and fragmentation as well as poaching and human-wildlife conflict issues.

The Bengal Tiger ranges in size from 300-450 pounds and is possibly the most well known to the public through zoos and media documentary’s. We have been saying all week that each of these subspeces are Endangered, if this is the largest population of all the tigers, you can understand why they are in such trouble.

Population status may include:

  • Bangladesh 362
  • Bhutan 67-81 (adults)
  • China 30-35
  • India 2500-3750
  • Western Myanmar 124-231
  • Nepal 93-97 (adults)

Year of the Tiger: Indochinese Tiger

Posted by Peter in Endangered Species,Featured

Part 4 of our Tiger species profiles

Indochinese Tiger Panthera tigris corbetti

Endangered, this species is distributed across Vietnam, Thailand, Myanmar, Southern China, Cambodia and Laos with a population of appriximately 700+ individuals although no single population holds more than 250 individuals.

Males of this species can reach up to 400lbs with females frequently around 250lbs. The IUCN Redlist notes that based on genetic analysis, Luo et al. (2004) identified P. t. corbetti as the likely ancestral tiger population, with the radiation into other subspecies taking place 72,000-108,000 years ago. This makes this species the mother (and father) of all Tiger subspecies.

According to the Save the Tiger Fund website, the population distribution is believed to be:

  • Cambodia – 150-300
  • China – 30-40
  • Laos – Present
  • Eastern Myanmar – 106-234
  • Thailand – 250-501
  • Vietnam – 200

Maps and information at: http://www.iucnredlist.org/apps/redlist/details/136853/0

Year of the Tiger: Malayan Tiger

Posted by Peter in Endangered Species

Part 3 of our Tiger species profile

Malayan Tiger Panthera tigris jacksoni

Malayan Tiger, Zoo Melaka, Malaysia

Malayan Tiger, Zoo Melaka, Malaysia

Recently discovered in 2004…ok, not discovered as they knew it was there, but re-classified as a distinct subspecies in 2004, this population is found only in the Malay Peninsula which includes the southern tip of Thailand and Peninsular Malaysia. Although the population is beleived to be around 500-600 individuals, this species is also on the decline and is considered Endangered.

The Houston Zoo currently houses two Malayan Tigers which can be seen across from the African Lions.

For an update on Malaysian Tiger conservation, check out the Malaysian Conservation Alliance for Tigers (MYCAT) or their Facebook page

For maps and detailed information: http://www.iucnredlist.org/apps/redlist/details/136893/0

Year of the Tiger: Sumatran Tigers

Posted by Peter in Endangered Species

Part 2 of our Tiger species profile

Sumatran Tiger Panthera tigris sumatrae

This species is found only on the Indonesian island of Sumatra and is the smallest of the tiger species at 200-250 pounds. Population estimates of approximately 400-500  individuals, this species is considered Critically Endangered. Although poaching is a concern as with all the tiger species, the Sumatran Tiger suffers from high rates habitat loss and fragmentation due to logging and palm oil plantation development. This species also suffers from a high rate of human-wildlife conflict on the island.

For more on this species, go to: http://www.iucnredlist.org/apps/redlist/details/15966/0

Year of the Tiger: Siberian (Amur)Tigers

Posted by Peter in Endangered Species,Featured

We thought we would catch you up on the 6 living Tiger species over the next week so check back daily for a new Tiger Blog.

Siberian (Amur) Tiger, Panthera tigris altaica

Also known today as Amur Tigers, this species can be found in the Southeast corner of Russia in the Sikhote-Alin mountain range east of the Amur River. Their former range included northeastern China and the Korean Peninsula, and as far west as Mongolia. Amurs are the largest living species of Tiger weighing in between 500 and 600+ lbs.

Critically Endangered, this is a population in decline: It is believed that only 320-400 Amur Tigers exist today in the wild, mostly in Russia with perhaps 10-20 in China. There are close to 450 Amur Tigers in accreditated zoos today including North America’s Association of Zoos and Aquariums (AZA) and the European Association of Zoos and Aquariua (EAZA)

In the early 1900′s, this population had dropped below 50 individuals as hunting (for sport as well as due to human-wildlife confilct) took a toll on this population until the 1940′s when the Soviet Union banned hunting of the species. Poaching still continues to this day due as Tiger’s are marketed for purported medicinal purposes.

For a more detailed account on this species:

1) http://www.iucnredlist.org/apps/redlist/details/15956/0

2) http://www.savethetigerfund.org

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