Habitation by humans and human activities like deforestation and converting nature into cropland.
The biggest threat we present to woodpeckers is loss of habitat, destruction of their habitat.
loss of habitat
Man is the biggest threat to kookaburras, due to habitat clearing.
The jaguar is threatened, but not endangered. The biggest threat is loss of habitat.
It would be difficult to determine the "biggest" threat to kiwi. Major threats are introduced animals such as dogs, cats and stoats. However, were it not for habitat loss, these animals would not be such a major threat.
The biggest threat to mandrills is humans who hunt them for bushmeat. Loss of habitat through deforestation is another threat.
The greatest threat to a butterflies are habitat change and loss due to residential and also the climate. I hope this answers your question! :)
Humans - we destroy their habitat and used to shoot them. If you mean predator as in wild animal, then it is probably a large cat depending on where they live.
AP Biology teachers that try to teach their class chi square, but end up having no idea what they are saying which results in confusing both the class and the teacher, wasting two days worth of class, causing mental breakdowns in most of the students, and having a single rather annoying student that continues to pronounce it 'shy' square instead of chi square.
The biggest threat would be habitat loss. However at this time, peacocks are not in any trouble.
Two major threats to the cacti are habitat destruction and commercial collecting of the plants.
Humans are the biggest threat to the western nectar bat. We destroy its habitat primarily by converting it for agriculture.