More than 6,400 migratory birds and other animals were killed in Nevada by drinking water in the cyanide-laced ponds produced by gold mining operations.
migratory birds all had red feathers.
( z1 have :ARG0 ( z2 bird :ARG0-of ( z3 migrate ) :mod ( z4 all ) ) :ARG1 ( z5 feather :ARG1-of ( z6 red ) ) )