When an abnormal wing structure was most likely cause due to?

An abnormal wing structure in animals, particularly in birds or insects, is most likely caused by genetic mutations, environmental factors, or developmental issues during the embryonic stage. These anomalies can result from exposure to pollutants, nutritional deficiencies, or pathogens that disrupt normal growth. Additionally, evolutionary pressures may lead to adaptations that result in unusual wing formations. Understanding the underlying causes can provide insights into both ecological health and species adaptability.