PLEASE TRY AND NAME ONE SPECIES OF animal man has killed off the planet earth? if you can
http://www.bluelion.org/recently_extinct...
http://www.50birds.com/extan/gextanimals...
http://www.earthwitness.com/ExtinctAnima...
http://www.earthwitness.com/ExtinctPlant...

If we all don%26#039;t do something soon about Global Warming the polar bears are probably gonna be killed off. : (

All previous answers are fine. Passenger pigeons have been gone for awhile too. Polar bears are dwindling due to global warming.Noticing no Polly wogs that turn in to frogs lately.

Passenger Pidgeon. Wooly Mammoth. Saber Tooth Tiger. Dodo Bird.

Tasmanian Tiger

the mamonth
that elephant looking beast

the dodo

soon polar bears and maybe even kaowala bears

dodo bird

dodo bird

i think a kind of buffalo....