Most Intelligent HominidMan (Homo sapiens) Second Most Intelligent MammalDolphin Most Intelligent apeChimpanzee Heaviest bony fishPangarianodon Heaviest crabPseudocarsinus Loudest arthropodMale cicada Hibernating MammalBat, Squirrel, Wood chink Hibernating birdPoor will Fish with four eyesAmbleps Living fossil arthropodLimulus Living fossil fishLatimaria Living fossil reptileSphenodon Longest distance flying birdsStemaparadisaea (Arctic tern). it covers 22,530 kms during migration. Heaviest Bird of PreyVulture gryphus. Fastest swimmer birdPygoscellus papua (gento penguin) Largest egg birdStruthio camelus (175 mm length, capacity) Smallest egg birdMellisuga minima - humming bird National Animal of AustraliaKangaroo National Animal of NewzealandKiwi National Animal of PakistanMarkhor Sharpest Memory animalElephant Ship of DesertCamel Horse of riverHippopotamus Tree ratVendiluria live in nest of bird Blood swelling batVampire bat Most powerful Electric fishElectrophorous electrius (370—500 volts) Light proudcing fishPhotoble, Phaar -on Malacocephalus etc. Sound proudcing fishMalapterurus, Tetradon etc. Highest Flier BirdsCygnus cygnus-Swan Height 27,000 feet. Largest sea birdDiomedia epomorphora (wing stretch 80—125 inches) Deepest Diver birdApteno dytes forsteri (Emperor Penguin) Most air borne bird (Common swift) Apus apus -9 months in air in a year.