How many animals a day die through natural causes?

The exact number of animals that die through natural causes each day is difficult to determine, as there is no single, comprehensive source of data. However, some estimates suggest that billions of animals die each year from natural causes, including predation, disease, starvation, and environmental hazards. For example, it has been estimated that in the United States alone, approximately 1.4 billion wild birds die each year due to natural causes such as predation, starvation, and disease. Additionally, it is estimated that approximately 1.3 million domestic animals die each year in the United States due to natural causes. These estimates provide a general sense of the magnitude of animal mortality due to natural causes, but the true number is likely much higher given the vast number of animals that exist worldwide.