2.1 Study Population
The study population was non-sympatrically distributed 80 individuals of four species of genus Turdus of the Turdidae family. Samples include two to three contour feathers, tissue from breast and liver of birds accidentally injured or died during migratory season of 2017-19 in autumn and deposit in State key laboratory of wildlife detection center in northeast forestry university, stored at 4 °C. The sample material, voucher identity, and geographical location are presented (Table.S1; Figure 1).