Ways in which animals become endangered?

Various contributions to animals becoming endangered include the following:

• Poaching and over-hunting
• Introduction and successful propagation of invasive species into native habitat which pushes out/kills off native wildlife
• Destruction of native/natural habitat to make room for roads, industry, suburbs, agriculture land, urban expansion, etc.
• Human intervention based on poor to inaccurate conservation management methods and beliefs, or out of ignorance in response of "greed" or need for some form of income, however legal it may be (see first point above)
• Climate change/global warming/natural catastrophic events