Twin

Twin four-month-old brown bear cubs play in a public bear park in Bern, Switzerland April 4, 2010. Credit: REUTERS/Michael Buholzer

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A Toy Poodle dog wears a pair of sunglasses at a dog show in Chiba, near Tokyo, January 24, 2010. Credit: REUTERS/Kim Kyung-Hoon

Baby

Baby male Asian Elephant 'Pathi Harn' plays in the mud at Taronga Zoo in Sydney, in this March 31, 2010 handout photo. Mother elephant Porntip gave birth to the calf at Sydney's main zoo on March 10, surprising vets and keepers who on March 8 declared the baby had died in the womb. Credit: REUTERS/Bobby Jo Vial/Handout

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A Caribbean flamingo runs across the water in its enclosure at Chester Zoo in northern England March 29, 2010. The zoo's 87 flamingos are being measured, weighed and microchipped for the first time in a decade as part of a health check. Credit: REUTERS/Phil Noble

Twin

Twin six-month-old polar bear cubs suckle from their mother Uslada at the city zoo in St. Petersburg, Russia March 25, 2010. The cubs were allowed to walk in an open-air cage for the first time since their birth, local media reported. Credit: REUTERS/Alexander Demianchuk

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A butterfly hatches from its pupa at the Natural History Museum in London March 31, 2010. A butterfly house will be opened to the public at the museum, housing butterflies from four continents, until September. Credit: REUTERS/Toby Melville

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A polar bear bites a mock Easter egg stuffed with food at its enclosure in the Buenos Aires, Argentina zoo April 1, 2010. Credit: REUTERS/Enrique Marcarian

Storks

Storks mate at sunset in Petrovec village, 20 km (12 miles) east of the capital Skopje, Macedonia March 30, 2010. Credit: REUTERS/Ognen Teofilovski

The

The Butler Bulldogs mascot takes to the court during a timeout in their NCAA Final Four semifinal college basketball game against Michigan State in Indianapolis, Indiana April 3, 2010. Credit: REUTERS/Jeff Haynes

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A man uses a camel to plough a field near the desert in Minqin county, Gansu province, China April 5, 2010. Another eight to 10 sandstorms are expected to hit North China in April and May as a result of the frequent cold spells, China Daily reported. Credit: REUTERS/Stringer