Kazuhiro Nogi/AFP/Getty Images
  • People walk on a hill covered with nemophila flowers in full bloom at Hitachi Seaside Park in Hitachinaka, Ibaraki Prefecture, May 3, 2017.
    Kazuhiro Nogi/AFP/Getty Images
  • A group of hikers pass a blooming rape field during a May Day walking tour near Hameln, western Germany, May 1, 2017.
    Julian Stratenschulte/dpa via AP Photo
  • Tulips bloom on Capitol Hill in Washington, April 5, 2017, on warm Spring day.
    Jose Luis Magana/AP Photo
  • Deer roam through bluebells (Hyacinthoides non-scripta) highlighted by early morning sun at Micheldever Wood in southern England, as a blast of Arctic weather has brought snow to northern parts of the U.K., on April 25, 2017.
    Victoria Jones/PA via AP Photo
  • Visitors posing for photos as they visit a 656-foot-long corridor covered with lavender flowers in Shenyang, northeast China's Liaoning province, on April 4, 2017.
    AFP/Getty Images
  • A lesser celandine (Ranunculus ficaria) blossoms by a brook at Somosko near Salgotarjan, Hungary, on April 11, 2017.
    Peter Komka/EPA
  • An aerial image taken with a drone shows conifers and broad-leafed trees in various shades of green in a forest near Sieversdorf, Germany, on April 21, 2017.
    Patrick Pleul/dpa Photo via Newscom
  • Spring lambs relax in the evening sunshine, in Bridport Dorset, U.K., on April 9, 2017.
    Geoffrey Swaine/REX/Shutterstock
  • Yellow daffodils grow near the North Parish Church, on April 24, 2017, in North Andover, Mass.
    Elise Amendola/AP Photo
  • General view of cable cars at the opening of the IGA 2017 in Steinmeier, Berlin, Germany, on April 13, 2017.
    action press/REX/Shutterstock
  • Two people walking near the waterfalls at Bridehead House, Little Bredy, Dorset, U.K., on April 5, 2017.
    Stuart Fretwell/REX/Shutterstock
  • A woman poses for a photographer in a buttercup flower field near Kibbutz Nir Yitzhak in southern Israel, just outside the Gaza Strip, April 18, 2017.
    Amir Cohen/Reuters
  • A red squirrel holds a flower in Bispgarden, Sweden, April 2017.
    Geert Weggen/Solent News/REX/Shutterstock
  • Tulips blossom in front of a blue sky in Wackernheim, Germany, April 5, 2017. The tulips can be picked and paid for by putting coins in a box.
    Andreas Arnold/dpa Photo via Newscom
  • Tourists visit Keukenhof spring garden in Lisse, near Amsterdam, Netherlands, April 19, 2017. Keukenhof attracts around 1 million visitors from all over the world. More than 7 million bulbs are in bloom this spring, with a total of 800 varieties of tulips, and the garden is open from March 23 until May 21, 2017.
    Peter Dejong/AP Photo
  • The rising sun silhouettes a skyline dominated by the Church of our Lady in Prague, Czech Republic, April 10, 2017.
    Martin Divisek/EPA
  • People take photos with a 12-foot tall Easter bunny topiary made of moss and ivy at Rockefeller Center, April 13, 2017 in New York. The annual floral Easter display will remain until April 19.
    Drew Angerer/Getty Images
  • Two men play a game of chess on a sunny day in Frankfurt, Germany, April 9, 2017.
    Alexander Bechner/EPA
  • A Canadian Goose walks under blossoming trees in Regent's Park, April 11, 2017, in London.
    Dan Kitwood/Getty Images
  • Boats are tied up at a moat near blooming cherry blossoms at Chidorigafuchi in Tokyo, April 7, 2017. Cherry blossom season marks the beginning of spring for the Japanese.
    Eugene Hoshiko/AP Photo
  • A family gathers beneath blossoming trees along Kelly Drive on a spring afternoon in Philadelphia, April 5, 2017. <br></br> See photos of the "Super Bloom" of desert flowers in California <a href="http://abcnews.go.com/US/photos/super-bloom-desert-wildflowers-landscape-blast-color-46651299"target="external">here</a>.
    Matt Rourke/AP Photo
  • A butterfly rests on flowers at a park in Fuzhou, China, April 5, 2017.
    Mei Yongcun/Xinhua/Newscom
  • Wild Konik horses on Wicken Fen, Cambridgeshire, England, April 2, 2017.
    Geoff Robinson Photography/REX/Shutterstock
  • The arrival of spring brings more daylight, rising temperatures and a positive outlook of rebirth and rejuvenation. The Eiffel Tower rises from behind blossoming flowers and trees on a spring day, in Paris, on March 14, 2017.
    Christophe Ena/AP Photo
  • Visitors are seen beneath cherry blossoms in bloom in Washington, on March 24, 2016. The 2016 National Cherry Blossom Festival is underway with blossoms currently in peak bloom. The festival commemorates the 1912 gift of three thousand cherry trees from Mayor Yukio Ozaki of Tokyo to the city of Washington, DC.
    Michael Reynolds/EPA
  • Julia Lu, 5, (L) and Amy Liu, 5, walk through a massive spring wildflower bloom caused by a wet winter in Lake Elsinore, Calif., March 14, 2017.
    Lucy Nicholson/Reuters
  • People play under the plum blossoms in Tiandang Mountain in Mianxian County, northwest China's Shaanxi Province, March 19, 2017.
    Tao Ming/Xinhua
  • A white-eye bird flies among cherry blossoms at the Nanjing Zhongshan Botanical Garden in Nanjing, China, Feb. 28, 2017.
    Yang Lei/Newscom
  • Crocuses and spring snowflakes blossom three weeks ahead the beginning of spring, on March 3, 2017, in Cologne, Germany.
    Federico Gambarini/Getty Images
  • Rape flowers are seen in full blossom in Luoping County, southwest China's Yunnan Province, March 2, 2017.
    Wu Kaixiang/Newscom
  • Tourists enjoy the cherry blossoms in Kunming, capital of southwest China's Yunnan Province, March 6, 2017.
    Hu Chao/Newscom
  • Ewes and lambs on Gwndwnwal Farm, March 2, 2017, in Brecon, Wales.
    Chris Jackson/Getty Images
  • A massive spring wildflower bloom caused by a wet winter is seen in Anza-Borrego Desert State Park, Calif., March 13, 2017.
    Steve Gorman/Reuters
  • Tulips are displayed during a preview of the Philadelphia Flower Show, March 10, 2017, at the Pennsylvania Convention Center in Philadelphia. The theme of this year's floral festival is "Holland: Flowering the World" and it is scheduled to run from March 11 through March 19.
    Matt Rourke/AP Photo
  • A couple stops to take in a lovely spring day, on March 6, 2017, in Liverpool, U.K.
  • A bee collects pollen from a blooming crocus, on March 2, 2017, in Freiburg, Germany.
    Patrick Seeger/Getty Images
  • People enjoy the scenery among peach blossoms at a farm in Luyang District of Hefei, capital of east China's Anhui Province, March 16, 2017.
    Guo Chen/Newscom
  • New Yorkers taking a lunch break in Brooklyn Bridge Park in DUMBO Brooklyn, enjoying spring-like weather, on Feb. 24, 2017, in New York City.
    Paul Martinka / Splash News
  • Displayed is a bicycle in an instillation by Mercer County Community College during a preview of the Philadelphia Flower Show, March 10, 2017 at the Pennsylvania Convention Center in Philadelphia.
    Matt Rourke/AP Photo
  • A young boy walking amidst wild mustard flowers which grow in fields across the Gaza Strip, as the official start of spring is marked by the Vernal Equinox in Beit Hanun, March 20, 2017.
    Mohammed Abed/AFP/Getty Images