Hemorrhagic septicemia, caused by the bacterium Pasteurella multocida, led to the death of thousands of Asian elephants in the 1990s, particularly in southern India.

Avian influenza is primarily transmitted among wild birds through respiratory droplets, which can occur during close contact, such as when birds share the same airspace or engage in aggressive behaviors.

Chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis, has been identified as a major factor in the decline of amphibian populations worldwide, leading to the extinction of numerous species.

Rabies, caused by the rabies virus, primarily affects the central nervous system of infected animals, leading to neurological damage and aggressive behavior, which can pose a threat to both wildlife and humans.

Lyme disease is primarily transmitted to humans through the bite of infected ticks, particularly Ixodes scapularis and Ixodes pacificus in North America.

Chronic wasting disease is a transmissible spongiform encephalopathy (TSE) caused by a prion and affects the central nervous system of deer, elk, and other cervids, leading to progressive neurological deterioration and eventually death.

Tuberculosis, caused by bacteria in the Mycobacterium tuberculosis complex, is primarily transmitted among wildlife populations through the inhalation of aerosolized bacteria expelled by infected animals during coughing, sneezing, or vocalizations.

White-nose syndrome in bats is caused by the fungus Pseudogymnoascus destructans, which infects the skin of bats during hibernation, leading to tissue damage, dehydration, and ultimately death.

Distemper virus, a highly contagious virus, primarily affects carnivores and can cause a range of symptoms, including respiratory problems, neurological disorders, and gastrointestinal issues, leading to significant mortality in wildlife populations.

Avian malaria is caused by a protozoan parasite Plasmodium gallinaceum and is transmitted by mosquitoes. It affects the blood of birds, leading to anemia, weakness, and potentially death.

Ebola virus, a highly virulent virus, causes hemorrhagic fever in wildlife populations, leading to severe bleeding, organ failure, and high mortality rates.

Avian cholera is caused by the bacterium Pasteurella multocida and primarily affects waterfowl and other aquatic birds. It leads to respiratory distress, septicemia, and high mortality rates.

Canine distemper virus, a highly contagious virus, primarily affects carnivores and can cause a range of symptoms, including respiratory problems, neurological disorders, and gastrointestinal issues, leading to significant mortality in wildlife populations.

Chytridiomycosis is caused by the fungus Batrachochytrium dendrobatidis and primarily affects amphibians. It leads to skin lesions, electrolyte imbalance, and ultimately death, contributing to amphibian declines worldwide.

West Nile virus, a mosquito-borne virus, primarily affects birds and can cause encephalitis and neurological symptoms, including tremors, seizures, and paralysis, leading to significant mortality in bird populations.