In the mid-1990s there were approximately 1 billion monarchs, but as of winter 2013-2014, the population had declined to 35 million. The annual "overwintering" count of monarchs released in February ...

A Monarch butterfly (Danaus plexippus) is pictured at the oyamel firs (Abies religiosa) forest, in Ocampo municipality, Michoacan State in Mexico on December 19, 2016.

Volunteer monarch counters Stephanie Turcotte, Shannon Conner, and Natalie Johnston compare notes in Pacific Grove Monarch Butterfly Sanctuary in December 2021. Image Credit: Candy Sarikonda.

There's a little bit of good news for the Monarch butterfly. Initial estimates from their winter grounds suggest there are more arriving this year than last year. That would appear to confirm ...

Thirty delicately carved monarch butterflies greet walkers and cyclists who cross Fredericton's Bill Thorpe Walking Bridge, ...

The migratory monarch butterfly, a North American icon with a continent-spanning annual journey, now faces the threat of extinction, according to a top wildlife monitoring group.

PACIFIC GROVE — Monarch butterfly numbers are down this year entering prime counting season, but experts aren’t panicking yet. “Butterfly populations are bouncy,” said Isis Howard, an ...

A butterfly sits on a leaf at Monarch Grove Sanctuary in Pacific Grove, Calif., on Nov. 10, 2021. Nic Coury / AP These butterflies suffer when the mercury gets up to 100 ...

LEHI, Utah — Butterfly enthusiasts are patiently waiting for Monarch butterflies to arrive in Utah after their migration was delayed due to cold and wet winter conditions.

A dangling monarch caterpillar is very close to transforming into a chrysalis, the extraordinary jewel from which a monarch butterfly emerges. If I lean in to see how close, it will curl up tight ...

Listing the monarch butterfly as ‘endangered’ actually might imperil it by Tate Watkins, opinion contributor - 05/15/20 7:00 AM ET ...

Going up into the Monarch Butterfly Biosphere Reserve, between the Mexican states of Michoacán and Estado de México at an altitude of almost 10,000 feet, can be dizzying.