Eight of 30 teals (Anas crecca) died several days following capture and Newcastle Disease Virus (NDV) was isolated from all eight. Brains from the dead birds were homogenized and inoculated into chicken embryos. The allantoic fluid from the embryos was inoculated into 10 domestic chickens susceptible to NDV and 10 chickens immunized against NDV. Eight of 10 (80%) susceptible chickens died, while the immunized chickens remained healthy. Anti-NDV serum showed complete homology against NDV and the eight isolates