Wildlife officials in Maryland are investigating the mysterious death of 13 bald eagles that were discovered near a farm on the state's Eastern Shore on Saturday afternoon. The incident is considered to be the largest single die-off of bald eagles in the state in 30 years.
Earth/Environment February 23, 2016
Common murres are dying by the thousands, washing ashore on beaches along the Alaska Gulf. Die-offs are not unusual but scientists have not been able to pinpoint the reason for this one.
Earth/Environment January 15, 2016
Tens of thousands of Saiga antelope drop dead in Kazakhstan. The critically endangered antelope has been here before, but that doesn't mean it'll continue to survive these mass die offs.
Animals September 6, 2015
Survey of mass animal die-offs finds they've been increasing for the last 70 years. Such events are often more severe than observed previously, researchers add.
Earth/Environment January 14, 2015