Habitat destruction and massive hunting.

Víctor Hugo López Bautista
403

Decades of poaching for its velvety pelt, peaking in the 1950s and 1960s, considerably diminished population numbers.Danna Paniagua Pérez 

BIUNLA 401

DANGER OF EXTINCTION: It´s in danger of extinction due to the lost of its habitats and water pollution.

Evelyn Gallardo Regalado 401

404

-Se esta extinguiendo por la explotación de recursos pesqueros, así como la disminución de su hábitat natural.
-Adrián Olalde Ortega
404

Su desaparición  se debió a la introducción del dingo o perro salvaje en su hábitat por los aborígenes. Principalmente su causa de desaparición fue por la caza intensiva, la destrucción de su hábitat y la competencia con los perros domésticos.

Sofía García Chávez
 404

Está en peligro de extinción debido a la deforestación.

Diana Sofía Bravo Monroy
404

LUCY AYALA TORRES 402

Marina Estefania Ferreyra Polit

402

The cause of its extinction was the trade of the skin and fangs. Also the destruction of their habitat in Taiwan because of the deforestation.

- Aneth M. Vargas Valencia
- 402

Ek Rodríguez
403

It may be the most familiar North American butterfly. Butterflies , help pollinate plants, making them a vital contributor to crop growth and food production.
Several factors have contributed to the monarch's decline; climate change, loss of reproductive habitats, predators, and deforestation in Mexico’s forests, have all impacted the butterfly’s migration pattern and habitat. The most significant threat is the decline in milkweed, the plant where monarchs lay their eggs, and that serves as the only food source for caterpillars.
Their colonies in Mexico now occupy the smallest area since records began in 1993.

Sofía Montserrat Contreras Huéramo 
401

Farmers have begun to move into snow leopard habitat.  This forces the snow leopard to turn to the livestock as a food source. Farmers, concerned about their livestock, often kill snow leopards to protect them.

Because of climate changes there is less prey for the leopard to eat. 
Fer Orozco
401

 Está en peligro ya que quedan perritos llaneros en un área total menor de 600 km²; además esta área está altamente fragmentada y por si fuera poco, está perdiendo terreno, extensión y calidad de hábitat a una velocidad muy alta. Como consecuencia el número de localizaciones y subpoblaciones está disminuyendo también.

Leonardo Jarquin Cendejas
404

 La causa más importante fue una serie de cambios climáticos que afectó gravemente a su hábitat natural y redujo enormemente a la población de alces irlandeses hace aproximadamente unos 10.600 años. 

-Javier Serao

-403

- Scientific name: Okapia johnstoni

-The okapi is endangered mainly because of the illegal hunt, the destruction of its habitat. It was also endangered by the civil war in the Congo (where it lives as a native to the Ituri Rainforest).

 
Ulises Garnica Velázquez
401

-Ivana Leilani Júnez Villicaña.
-401

Jorge Espinosa Aguirre
403

The blue whales have been massively hunted since the beginning of the XX century for their oil, and they've managed only a minor recovery since then. Humans have made that process even slower with these threats:

- Many are injured or die each year from impacts with large ships, as well as becoming trapped or entangled in fishing gear.

- The ever-increasing amount of ocean noise, including sonar make it harder for them to communicate, also interfering with foraging behavior.

- The accumulation of polychlorinated biphenyl (PCB) chemicals within the whale's body due to humans.

- With global warming causing glaciers and permafrost to melt rapidly and allowing a large amount of fresh water to flow into the oceans, there could be a disruption in the thermohaline circulation affecting their migratory patterns.

- The change in ocean temperature would also affect the blue whale's food supply.
Monique Delfín Weber
401

-Es consumido en los países asiáticos mayoritariamente. 
A parte de su valor culinario, tiene otros usos, como reconstituyente y afrodisíaco en la medicina tradicional de este continente. A principios de los años 90 comenzó a desaparecer de las costas asiáticas, obligando así la búsqueda de nueva zonas de pesca, tales como Palau, México y Ecuador. Son importantes pues ayudan a fertilizar el fondo marino y representan alimento para otras especies.
 -Zinhtya de la Luz Duarte Vázquez 404.

Why is it on danger of extiction? 
The main cause of its decline in recent years is the severe degradation of its natural habitat, mainly through water pollution, but also due to the introduction of competing or predatory fish species.

- Jorge L. Amante Ojeda
- 402