The roughly 800 dolphin deaths observed off central and northern Peru are likely a result of natural causes, Fox New Latino website said on Wednesday, citing a government agency finding.
Meanwhile, deaths of more than 1,200 pelicans were blamed on starvation, owing to warming-induced migration of the cold-water fish that are the birds' food.
According to Peru's Sea Institute, human activities have been "ruled out as a direct cause of death" for the dolphins. However, the report left the exact cause of death undetermined.
As for the pelican deaths, these were attributed to lack of food, a government minister stated told a Peru radio audience on Tuesday.
Migration of cold-water fish away from the coast has followed warming of the sea surface off central and northern Peru. Most of the dead birds were found to be "very young pelicans", inexperienced in gathering their own food.
The hundreds of dead seabirds were found along a stretch of beaches in Piura and Lambayeque regions earlier this year, leading to calls for an official investigation.
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A surge of milder air will bring the warmest air since mid-November to the United Kingdom this week.
Dry weather will prevail much of the week across Germany as the recent chill eases.
The storm system that drenched the south-central U.S. since this past weekend will soak the Southeastern and mid-Atlantic states on Tuesday.
A blast of arctic air will create wintry travel in the Upper Midwest and part of the Northeast later this week.
On the heels of Cyclone Nada, a more significant tropical cyclone threatens to take aim at India this week.
The storm that recently brought the first snow of the season to coastal areas of the northwestern U.S. will target the interior West into midweek.
Before the coldest air so far this season arrives, parts of the northeastern United States will face slow and slick travel early this week.
The threat for flash flooding and localized severe thunderstorms, including isolated tornadoes, will expand across the southern United States early this week.