MEXICO CITY — Wild dogs mauled and killed four people whose bodies were found over the past two weeks in a park on the edge of Mexico City, authorities confirmed Monday. In one case, a teenage girl frantically called her sister with her cellphone to plead for help as the attack took place.

Neighbors of the Cerro de la Estrella, a partly wooded, hilltop park surrounded by the city's poor and populous Iztapalapa district, first found the bodies of a 26-year-old woman and a 1-year-old child in the area on Dec. 29, authorities in Mexico's capital said.

The woman, Shunashi Mendoza, was missing her left arm, and prosecutors said that both she and the boy had bled to death and been partially eaten.

Then on Friday visitors to the same park found the bodies of a teenage couple who had also bled to death.

"Experts have established that due to the gravity of the wounds, at least 10 dogs were involved in each attack," Mexico City prosecutors said in a statement.

In the second attack, Alejandra Ruiz, 15, and her boyfriend Samuel Martinez, 16, had gone to the park Friday afternoon.

The girl called her sister Diana Ruiz at around 7 p.m. pleading for help.

"Several dogs are attacking us, help me!" the girl screamed. The call then stopped.

Ruiz told Milenio Television she thought her sister was joking and still doesn't believe her sister was killed by dogs despite the call.

"What kind of dog can tear the skin from your whole arm and leave just bone and if it was an attack dog why didn't it attack her neck?" Ruiz asked. "What's most shocking is that one of her breasts was mutilated."

She said she later visited the place of the attack and saw no pools of blood. "There needs to be a thorough investigation," she added.

Mexico City Public Safety Secretary Jesus Rodriguez warned against visiting the park and said all the dogs in the area will be trapped and checked to see if they were involved.

At least 100 police officers were scouring the park in search of wild dogs. They had trapped 25 by Monday night, including 10 females, eight males and seven puppies. The dogs had been living in caves and crevices in the park, prosecutors said.

Experts are testing the dogs' hair for traces of human blood and will also test their stomach contents. Authorities did not say what they would do with the animals.

Local newspapers published photos of the dogs. Several looked like domestic pets, suggesting the dogs were abandoned animals or their offspring who had formed a pack or packs in the hilltop park.

Iztapalapa is a massive and poor district on the eastern outskirts of Mexico City, and stray dogs roam many of its streets. Hundreds of thousands of spectators gather each Holy week in the Cerro de la Estrella park to watch a reenactment of the mock crucifixion of Christ.

Mexico City's famed Chapultepec Park, in the city's center, also has feral dogs living in wooded areas and there have been reports of minor attacks on human, but none fatal.

In that case, animal rights activists have urged authorities not to kill the dogs, instead spaying them and either leaving them in the park or finding them homes.

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  • <strong>Scientific Name:</strong> <em>Diceros sumatrensis</em> <strong>Common Name: </strong>Sumatran rhino <strong>Category:</strong> Rhino <strong>Population: </strong> < 250 individuals <strong>Threats To Survival:</strong> Hunting for horn -used in traditional medicine

  • <strong>Scientific Name:</strong> <em>Eleutherodactylus thorectes</em> <strong>Common Name: </strong>Macaya Breast-Spot Frog <strong>Category:</strong> Frog <strong>Population: </strong>Unknown <strong>Threats To Survival:</strong> Habitat destruction due to charcoal production and slash-and-burn agriculture Credit: <a href="http://www.robindmoore.com">Robin Moore</a>

  • <strong>Scientific Name:</strong> <em>Scaturiginichthys vermeilipinnis</em> <strong>Common Name: </strong>Red-Finned Blue Eye <strong>Category:</strong> Freshwater Fish <strong>Population: </strong>2,000 - 4,000 Individuals <strong>Threats To Survival:</strong> Predation by introduced species

  • <strong>Scientific Name:</strong> <em>Rafetus Swinhoei</em> <strong>Common Name: </strong>Red River Giant Softshell Turtle <strong>Category:</strong> Turtle <strong>Population: </strong>4 known individuals <strong>Threats To Survival:</strong> Hunting for consumption and habitat destruction and degradation as a result of wetland destruction and pollution

  • <strong>Scientific Name:</strong> <em>Neurergus kaiseri</em> <strong>Common Name: </strong>Luristan newt <strong>Category:</strong> Newt <strong>Population: </strong> < 1000 mature individuals <strong>Threats To Survival:</strong> Illegal collection for pet trade

  • List Provided By Zoological Society Of London/ International Union For Conservation Of Nature

    <strong>Scientific Name:</strong> <em>Poecilotheria metallica</em> <strong>Common Name: </strong>Peacock Parachute Spider <strong>Category:</strong> Spider <strong>Population: </strong>Unknown <strong>Threats To Survival:</strong> Habitat loss and degradation as a result of deforestation, firewood collection and civil unrest

  • <strong>Scientific Name:</strong> <em>Atelopus balios</em> <strong>Common Name: </strong>Rio Pescado Stubfoot Toad <strong>Category:</strong> Toad <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Chytridiomycosis and habitat destruction due to logging and agricultural expansion

  • <strong>Scientific Name:</strong> <em>Johora Singaporensis</em> <strong>Common Name: </strong>Singapore Freshwater Crab <strong>Category:</strong> Crab <strong>Population: </strong>Unknown <strong>Threats To Survival:</strong> Habitat degradation - reduction in water quality and quantity

  • <strong>Scientific Name:</strong> <em>Abies beshanzuensis</em> <strong>Common Name: </strong>Baishan Fir <strong>Category:</strong> Conifer <strong>Population: </strong>5 mature individuals <strong>Threats To Survival:</strong> Agricultural expansion and fire

  • <strong>Scientific Name:</strong> <em>Actinote zikani </em> <strong>Common Name: </strong>None <strong>Category:</strong> Butterfly <strong>Population: </strong>Unknown, one population remaining <strong>Threats To Survival:</strong> Habitat degradation due to pressure from human populations

  • <strong>Scientific Name:</strong> <em>Aipysurus foliosquama</em> <strong>Common Name: </strong>Leaf Scaled Sea-Snake <strong>Category:</strong> Sea snake <strong>Population: </strong> Unknown, two subpopulations remain <strong>Threats To Survival:</strong> Unknown - likely degradation of coral reef habitat

  • <strong>Scientific Name:</strong> <em>Amanipodagrion gilliesi</em> <strong>Common Name: </strong>Amani Flatwing <strong>Category:</strong> Damselfly <strong>Population: </strong> < 500 individuals est. <strong>Threats To Survival:</strong> Habitat degradation due to increasing population pressure and water pollution

  • <strong>Scientific Name:</strong> <em>Antilophia bokermanni</em> <strong>Common Name: </strong>Araripe Manakin <strong>Category:</strong> bird <strong>Population: </strong>779 individuals (est 2010) <strong>Threats To Survival:</strong> Habitat destruction due to expansion of agriculture and recreational facilities and water diversion

  • <strong>Scientific Name:</strong> Antisolabis seychellensis <strong>Common Name: </strong> Seychelles Earwig <strong>Category:</strong> Earwig <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Invasive species and climate change

  • <strong>Scientific Name:</strong> Aphanius transgrediens <strong>Common Name: </strong>None <strong>Category:</strong> Freshwater fish <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Competition and predation by Gambusia and road construction

  • <strong>Scientific Name:</strong> Ardeotis nigriceps <strong>Common Name: </strong> Great Indian Bustard <strong>Category:</strong> Bird <strong>Population: </strong> 50 -249 mature individuals <strong>Threats To Survival:</strong> Habitat loss and modification due to agricultural development

  • <strong>Scientific Name:</strong> Aproteles bulmerae <strong>Common Name: </strong>Bulmer's Fruit Bat <strong>Category:</strong> Bat <strong>Population: </strong>150 individuals (est) <strong>Threats To Survival:</strong> Hunting and cave disturbance

  • <strong>Scientific Name:</strong> Ardea insignis <strong>Common Name: </strong>White Bellied Heron <strong>Category:</strong> Bird <strong>Population: </strong>70-400 individuals <strong>Threats To Survival:</strong> Habitat destruction and degradation due to hydropower development

  • <strong>Scientific Name:</strong> <em>Astrochelus yniphora</em> <strong>Common Name: </strong> Ploughshare Tortoise / Angonoka <strong>Category:</strong> Tortoise <strong>Population: </strong>440-770 <strong>Threats To Survival:</strong> Illegal collection for international pet trade

  • <strong>Scientific Name:</strong> <em>Aythya innotata</em> <strong>Common Name: </strong>Madagascar Pochard <strong>Category:</strong> Bird <strong>Population: </strong> Approximately 20 mature individuals <strong>Threats To Survival:</strong> Habitat degradation due to slash-and-burn agriculture, hunting, and fishing / introduced fish

  • <strong>Scientific Name:</strong> <em>Azurina eupalama</em> <strong>Common Name: </strong> Galapagos damsel fish <strong>Category:</strong> Pelagic fish <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Climate Change - oceanographic changes associated with the 1982 / 1983 El Nino are presumed to be responsible for the apparent disappearance of this species from the Galapagos

  • <strong>Scientific Name:</strong> <em>Bahaba taipingensis</em> <strong>Common Name: </strong> Giant yellow croaker <strong>Category:</strong> Pelagic fish <strong>Population: </strong> Unknown (declining) <strong>Threats To Survival:</strong> Over-fishing, primarily due to value of swim-bladder for traditional medicine - cost per kilogram exceeded that of gold in 2001

  • <strong>Scientific Name:</strong> <em>Batagur baska</em> <strong>Common Name: </strong> Common Batagur/ Four-toed terrapin <strong>Category:</strong> Turtle <strong>Population: </strong> Unknown (declining) <strong>Threats To Survival:</strong> Illegal export and trade from Indonesia to China

  • <strong>Scientific Name:</strong> Bazzania bhutanica <strong>Common Name: </strong>None <strong>Category:</strong> Liverwort <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Habitat degradation and destruction due to forest clearance, overgrazing and development

  • <strong>Scientific Name:</strong> <em>Beatragus hunteri</em> <strong>Common Name: </strong>Hirola <strong>Category:</strong> Antelope <strong>Population: </strong> < 1000 individuals <strong>Threats To Survival:</strong> Habitat loss and degradation, competition with livestock, poaching

  • <strong>Scientific Name:</strong> <em>Bombus franklinii</em> <strong>Common Name: </strong>Franklin's Bumble Bee <strong>Category:</strong> Bee <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Disease from commercially bred bumblebees and habitat destruction and degradation

  • <strong>Scientific Name:</strong> Brachyteles hypoxanthus <strong>Common Name: </strong> Northern muriqui <strong>Category:</strong> Primate <strong>Population: </strong> < 1,000 individuals <strong>Threats To Survival:</strong> Habitat loss and fragmentation due to large-scale deforestation and selective logging

  • <strong>Scientific Name:</strong> <em>Bradypus pygmaeus</em> <strong>Common Name: </strong>Pygmy sloth <strong>Category:</strong> Sloth <strong>Population: </strong> < 500 individuals <strong>Threats To Survival:</strong> Habitat loss due to illegal logging of mangrove forests for firewood and construction and hunting of the sloths

  • <strong>Scientific Name:</strong> <em>Callitriche pulchra</em> <strong>Common Name: </strong>None <strong>Category:</strong> Freshwater plant <strong>Population: </strong> Unknown (declining) <strong>Threats To Survival:</strong> Exploitation of the species' habitat by stock, and modification of the pool by local people

  • <strong>Scientific Name:</strong> <em>Calumma tarzan</em> <strong>Common Name: </strong>Tarzan's Chameleon <strong>Category:</strong> Chameleon <strong>Population: </strong>Unknown <strong>Threats To Survival:</strong> Habitat destruction for agriculture

  • <strong>Scientific Name:</strong> <em>Cavia intermedia</em> <strong>Common Name: </strong>Santa Catarina's Guinea Pig <strong>Category:</strong> Guinea Pig <strong>Population: </strong> 40-60 individuals <strong>Threats To Survival:</strong> Habitat disturbance and possible hunting; small population effects

  • <strong>Scientific Name:</strong> <em>Cercopithecus roloway</em> <strong>Common Name: </strong>Roloway Guenon <strong>Category:</strong> Primate <strong>Population: </strong>Unknown <strong>Threats To Survival:</strong> Hunting for consumption as bushmeat, and habitat loss

  • <strong>Scientific Name:</strong> <em>Coleura seychellensis</em> <strong>Common Name: </strong>Seychelles Sheath-Tailed Bat <strong>Category:</strong> Bat <strong>Population: </strong> < 100 mature individuals (est 2008) <strong>Threats To Survival:</strong> Habitat degradation and predation by invasive species

  • <strong>Scientific Name:</strong> <em>Cryptomyces maximus</em> <strong>Common Name: </strong>None <strong>Category:</strong> Fungus <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Limited availability of habitat

  • <strong>Scientific Name:</strong> <em>Cryptotis nelsoni</em> <strong>Common Name: </strong>Nelson's Small-Eared Shrew <strong>Category:</strong> Shrew <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> habitat loss due to logging cattle grazing, fire and agriculture

  • <strong>Scientific Name:</strong> <em>Cyclura collei</em> <strong>Common Name: </strong>Jamaican Iguana <strong>Category:</strong> Iguana <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Predation by introduced species and habitat destruction

  • <strong>Scientific Name:</strong> <em>Dendrophylax fawcettii</em> <strong>Common Name: </strong>Cayman Islands Ghost Orchid <strong>Category:</strong> Orchid <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Habitat destruction due to infrastructure development

  • <strong>Scientific Name:</strong> <em>Diomedea amsterdamensis</em> <strong>Common Name: </strong>Amsterdam Island Albatross <strong>Category:</strong> Bird <strong>Population: </strong>100 mature individuals <strong>Threats To Survival:</strong> Disease and incidental capture in long-line fishing operations

  • <strong>Scientific Name:</strong> <em>Diospyros katendei</em> <strong>Common Name: </strong> None <strong>Category:</strong> Tree <strong>Population: </strong>20 individuals, one population <strong>Threats To Survival:</strong> High pressure from communities for agricultural activity, illegal tree felling, habitat degradation due to alluvial gold digging and small population

  • <strong>Scientific Name:</strong> <em>Dipterocarpus lamellatus</em> <strong>Common Name: </strong>None <strong>Category:</strong> Dipterocarp (tree) <strong>Population: </strong>12 individuals <strong>Threats To Survival:</strong> Habitat loss and degradation due to logging of lowland forest and creation of industrial plantations

  • <strong>Scientific Name:</strong> <em>Discoglossus nigriventer</em> <strong>Common Name: </strong> Hula painted frog <strong>Category:</strong> Frog <strong>Population: </strong>Unknown (recent rediscovery in 2011) <strong>Threats To Survival:</strong> Predation by birds and range restriction due to habitat destruction

  • <strong>Scientific Name:</strong> <em>Discorea strydomiana</em> <strong>Common Name: </strong>Wild Yam <strong>Category:</strong> Yam <strong>Population: </strong>200 Individuals <strong>Threats To Survival:</strong> Collection for medicinal use

  • <strong>Scientific Name:</strong> <em>Dombeya mauritiana</em> <strong>Common Name: </strong>None <strong>Category:</strong> Flowering plant <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Habitat degradation and destruction due to encroachment by alien invasive plant species and cannabis cultivation

  • <strong>Scientific Name:</strong> <em>Eleocarpus bojeri</em> <strong>Common Name: </strong>None <strong>Category:</strong> Flowering plant <strong>Population: </strong> < 10 individuals <strong>Threats To Survival:</strong> Small population and degraded habitat

  • <strong>Scientific Name:</strong> <em>Eleutherodactylus glandulifer</em> <strong>Common Name: </strong>La Hotte Glanded Frog <strong>Category:</strong> Frog <strong>Population: </strong>Unknown (declining) <strong>Threats To Survival:</strong> Habitat destruction due to charcoal production and slash-and-burn agriculture

  • <strong>Scientific Name:</strong> <em>Eriosyce chilensis</em> <strong>Common Name: </strong>Chilenito <strong>Category:</strong> Cactus <strong>Population: </strong> < 500 individuals <strong>Threats To Survival:</strong> Collection of flowering individuals

  • <strong>Scientific Name:</strong> <em>Erythrina schliebenii</em> <strong>Common Name: </strong>Coral Tree <strong>Category:</strong> Flowering tree <strong>Population: </strong> < 50 individuals <strong>Threats To Survival:</strong> Limited habitat and small population size increasing vulnerability to stochastic events

  • <strong>Scientific Name:</strong> <em>Euphorbia tanaensis</em> <strong>Common Name: </strong>None <strong>Category:</strong> Semi-deciduous tree <strong>Population: </strong>4 mature individuals <strong>Threats To Survival:</strong> Illegal logging and habitat degradation due to agricultural expansion and infrastructure development

  • <strong>Scientific Name:</strong> <em>Eurynorhynchus pygmeus</em> <strong>Common Name: </strong>Spoon-Billed Sandpiper <strong>Category:</strong> Bird <strong>Population: </strong> < 100 breeding pairs <strong>Threats To Survival:</strong> Trapping on wintering grounds and land reclamation.

  • <strong>Scientific Name:</strong> <em>Ficus katendei</em> <strong>Common Name: </strong>None <strong>Category:</strong> Tree (ficus) <strong>Population: </strong> < 50 mature individuals <strong>Threats To Survival:</strong> Agricultural activity, illegal tree felling and habitat degradation due to alluvial gold digging

  • <strong>Scientific Name:</strong> <em>Geronticus eremita</em> <strong>Common Name: </strong>Northern Bald Ibis <strong>Category:</strong> Bird <strong>Population: </strong>200-249 mature individuals <strong>Threats To Survival:</strong> Habitat degradation and destruction, and hunting