Origin of the domestic dog or the result of natural introgression as the dog expanded across Eurasia. In 2018, a study found a small amount of dog ancestry in 62% of Eurasian wolf specimens looked at, that hybridization had occurred across a wide number of timescales and not just recently, however in contrast there was almost no admixture detected in the North American specimens. There was introgression of the male dog into the wolf, but also one hybrid detected which was the result of a male wolf crossed with a female dog. Wolves have maintained their phenotype differences from the dog, which indicates low-frequency hybridization.
Parasitic flies of domestic animals flies in the Phylum Arthropoda, Order Insecta. Families and genera of dipteran flies are emphasized rather than many individual species. Disease caused by the feeding activity of the flies is described here under Parasitic disease. Disease caused by small pathogenic organisms that pass from the flies to domestic animals is described here under Transmitted organisms; prominent examples are provided from the many species. Disease caused by the feeding activity of dipteran flies is described here under Parasitic disease. Disease caused by small pathogenic organisms that pass from the flies to domestic animals is described here under Transmitted organisms; these organisms