A look at some of our planet’s smallest creatures.
Itsy-Bitsy Endangered Frog Bred in Bid to Save Species
A baby limosa harlequin frog on a U.S. quarter.
This March 10, 2012 photo provided by El Dorado DOG Photography shows a female Dachshund mix named Beyonce on top of an iPhone in El Dorado Hills, Calif. The puppy named after one of the world's biggest pop stars could set the world's record for tiniest dog. Animal rescuers in Northern California say that Beyonce was so small at birth that she could fit into a spoon. (AP Photo/El Dorado DOG Photography, Lisa Van Dyke) NO SALES NO ARCHIVE MANDATORY CREDIT
A juvenile of the newly discovered Brookesia micra on a fingertip. Photo: PLoS ONE / Frank Glaw / DAPD / AP
Tiny Exotic Snail Invades Earth
This is the mudsnail Potamopyrgus antipodarum, next to a pencil head for scale.
A Psyllophyrne didactyla, known as the flea-toad, rests on the nail of a small finger on August 17, 1998 in the University of Rio de Janeiro, Brazil. Considered the smallest vertebrate in the world, this toad, which measures less than 10 millimiters is being used by scientists at the University of Rio de Janeiro as a measure of how much the Atlantic rain forest is being destroyed. This toad is highly suceptible to changes and it's population in the rain forest is being analyzed. according to the team studying the toad, everytime the rainforest is diminished, the toads population decreases considerably.(AP Photo/Carlos Frederico Rocha)
In this photo released by Carnol, Switzerland and Raffles Museum, undate photo shows the world's smallest fish on record in an acidic peat swamp in Indonesia, a member of the carp family which has a see-through body and a head that is unprotected by a skeleton, researchers said Wednesday, Jan. 25, 2006. (AP Photo/Maurice Kottelat, Carnol, Switzerland and Raffles Museum, HO)
A specimen of the Schindleria Brevipinguis or Stout Infantfish, believed to be the world's smallest vertebrate, is seen in this undated photo. The tiny fish reaches no more than 7 to 8 millimeters (0.27 to 0.31 inches) long and was discovered 20 years ago and scientsts have studied the minute minnow to better understand its life cycle before releasing the news of the discovery. (AP Photo/Australian Museum, Carl Bento, ho)
Tom Trnski of the Australian Museum in Sydney holds a vial with a specimen of the Schindleria Brevipinguis or Stout Infantfish, believed to be the world's smallest vertebrate Wednesday, July 7, 2004. The tiny fish reaches no more than 7 to 8 millimeters (0.27 to 0.31 inches) long and was discovered 20 years ago and scientists have studied the minute minnow to better understand its life cycle before releasing the news of the discovery. (AP Photo/Rick Rycroft)
This undated photo provided by Penn State University Prof. Blair Hedges shows a Caribbean gecko, Sphaerodactylus ariasae, one of the two smallest reptile species known to exist, curled up on a dime. Found in the Dominican Republic, the gecko is about 16 mm, and is also the smallest amniote vertebrate of 25,000 species (includes birds, mammals, and reptiles). Hedges described "I found it with a colleague, while crawling on my hands and knees among dead leaves, anticipating a small lizard, but that not that small!" He said. (AP Photo/Penn State University, Blair Hedges)