What is the effect of too much selenium on wildlife/animals?
In animals toxic levels may lead to death or birth deformities in offspring. In fish and birds, in addition to overt deformities, too much selenium can lead to reproductive failure and Cachexia — starvation and wasting even though there is enough food. Note that because of bioaccumulation, the levels for protection of wildlife (5 ppb) are ten times lower than levels to protect humans (50 ppb).