The early arrival of the dolphins can be attributed to rainfall from cyclone Nisarga that caused rainfall over the Chure range.
High elevation areas in Colorado received June snowfall.
In Alaska, pasque flowers are known to bloom in May, but increasingly warm temperatures may create conditions that lead to earlier bloom times.
Mother's Day will bring Arctic blasts, wintry conditions and records low temperatures for two-thirds of the US.
The first two arctic terns of the season were spotted in Southeast Iceland on Saturday morning, according to the Southeast Iceland Bird Observatory. Their arrival is two or three days earlier than usual. Bird enthusiasts across the country are following along with migratory species as they return to their breeding grounds in Iceland.
"It is unusual for bears with youngsters to wake up so early and it is difficult to say why these have come out. The bears may have been disturbed by humans or other animals."
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