Invasive species are non-native species that have been introduced to an area and have become a threat to native species. They are characterized by their ability to reproduce and spread quickly, adapt to a variety of habitats, and lack natural predators or competitors in their new environment.

Invasive species can impact endangered species through competition for resources such as food and habitat, predation, and habitat modification. They can also transmit diseases to endangered species, leading to population declines.

The introduction of the Nile perch to Lake Victoria led to the decline of over 200 native fish species due to competition for food and habitat.

Kudzu, water hyacinth, and giant hogweed are all invasive plant species known for their rapid growth and ability to form dense monocultures, displacing native vegetation and disrupting ecosystems.

The management of invasive species involves a combination of strategies, including biological control (introducing natural predators or competitors), chemical control (using herbicides or pesticides), and mechanical control (physical removal or habitat modification).

The chestnut blight fungus, introduced from Asia, caused the decline of the American chestnut tree, leading to its near extinction.

The Asian tiger mosquito is a known vector for malaria, dengue fever, and yellow fever, posing a significant public health risk in many regions.

Invasive species can contribute to the extinction of endangered species through direct competition for resources, habitat destruction and modification, and the introduction of diseases and parasites, leading to population declines and increased vulnerability to extinction.

The management of invasive species requires early detection and rapid response to prevent their establishment and spread, public education and awareness to promote responsible behavior, and international cooperation to address the transboundary nature of the issue.

The small Indian mongoose, feral pigs, and black rats are all invasive species that have contributed to the decline of the native Hawaiian honeycreeper population through predation, habitat destruction, and competition for resources.

The introduction of the cane toad to Australia led to the decline of native predators due to its toxic skin, which caused many predators to die after consuming it.

Invasive species can impact endangered species through hybridization and genetic introgression, alteration of fire regimes, disruption of pollination and seed dispersal, and other ecological interactions.

The management of invasive species often involves habitat restoration and management, development of resistant crop varieties, quarantine and border control measures, and other strategies to prevent their introduction, establishment, and spread.

The common raven is an invasive species that has contributed to the decline of the native California condor population through predation on eggs and chicks.

The introduction of the Asian carp to North American waters has led to the decline of native fish species due to competition for food and habitat.