Pictures: Amazing spring picturesPublished26 March 2014Image caption, The daffodils and cherry blossoms have bloomed, the lambs have arrived and the weather is getting warmer. Yes, spring is here! Check out this gallery of photos capturing the spring rituals of Britain's wildlife. This is a brimstone, one of our early-emerging butterflies.Image caption, A grass snake in the spring sunshine at Hatfield Moor in South Yorkshire, England. Allen Holmes captured the image, he said: "I spotted it basking at my feet and was able to slowly crouch down and get a close-up."Image caption, Two brown hares boxing. At this time of year it's common for hares to fight when females receive unwanted male attention, hence the phrase 'mad March hares'.Image caption, This snake is already displaying its mating colours, hoping for some early interest from females. "The males usually turn green by April but this one is already quite a bright green," said Ian Kirk, the photographer who captured the image.Image caption, A romantic portrait of a pair of swans together in Leicestershire, England. The birds usually pair for life and renew their bonds each spring with displays of love.Image caption, Meanwhile, garden birds have been seen preparing for potential new arrivals. This long-tailed tit is collecting feathers for a nest.Image caption, This common frog is surrounded by spawn in a roadside ditch in Glen Lethnot, Scotland.