Popular beast alternate modes

When arriving on Earth, there are millions of animal species a Cybertronian might scan for an alternate mode. Some genera, however, are extremely popular with Cybertronians.

Cephalopods

 * Tako Tank
 * Dead End (BWN)

Squids (order Teuthida)
 * Tentakil (G1) / Tentakil (Masterforce) / Tentakil (Energon) / Scylla
 * Claw Jaw / Scuba / Ikard

Insects
Stag beetles (family Lucanidae)
 * Shrapnel (G1) / Zaptrap
 * Chop Shop
 * Insecticon (BW)
 * Beetle
 * Scarem

Scarabs and rhinoceros beetles (family Scarabaeidae)
 * Bombshell / Salvo
 * Barrage (Decepticon)
 * Ram Horn / Motorarm
 * Needler
 * Insecticon (Energon)

Grasshoppers and locusts (order Caelifera)
 * Kickback (G1) / Shothole
 * Ransack (G1)
 * Scourge (BW)

Wasps and ants (order Hymenoptera)
 * Waspinator / Dirgegun
 * Buzz Saw
 * Injector / Rartorarta (partially)
 * Inferno (BW) / Antagony
 * Scavenger (BW)

Spiders
Generation 1 / Beast Era Black Widow Spiders (Latrodectus mactans)
 * Arachnid
 * Tarantulas
 * Blackarachnia
 * Arcee (G1)
 * Crystal Widow

Animated
 * Blackarachnia

Crabs

 * Cancix
 * Octopunch
 * Rampage (BW) / Shokaract
 * Razorclaw (BW) / Rockbuster
 * Razor-Sharp

Scorpions
Generation 1/Beast Era
 * Double Punch (G1)
 * Pincher
 * Poison Bite
 * Scorpia
 * Scorponok (G1) / BlackZarak
 * Scorponok (BW) / Sandstorm (BW) / Double Punch (BW)
 * Quickstrike (BW) (partially)
 * Scorpulator

Unicron Trilogy
 * Scorponok (Energon) / Dark Scorponok

Transformers (2007)
 * Scorponok (Movie)

Manta Rays (Manta birostris)

 * Seawing (G1) / Kraken / Terrormander / Seawing (Energon) (unreleased)
 * Manta Ray (BW)
 * Depth Charge

Sharks
Great White Shark (Carcharodon carcharias)
 * Overbite (G1)/Sea Phantom/Overbite (Energon) (unreleased)
 * Cybershark / Sky-Byte

Hammerhead Shark (genus Sphyrna)
 * Cybershark / Hellscream / Overbite (Universe)
 * Air Hammer (partially)
 * Hammerstrike

Sawshark (genus Pliotrema and genus Pristiophorus)
 * Sharp Edge

Tyrannosaurus
Generation 1/Beast Era
 * Grimlock (G1)
 * Overkill
 * Megatron (BW) / T-Wrecks
 * Trypticon / Gigastorm
 * Tyrannitron
 * Terrorsaur (Classics) / Gnashteeth / Chromebite

Unicron Trilogy
 * Grimlock (Energon)
 * Megatron (Cybertron)
 * Predacon (Armada)

Animated
 * Grimlock (Animated)

Timelines
 * Grimlock (Timelines)

Triceratops
Generation 1/Beast Era
 * Slag
 * Guiledart / Triceradon
 * Knockdown (Classics) / Ironlunge

Dinobots
 * Triceradon (Dinobots)

Animated
 * Snarl (Animated)

Stegosaurus
Generation 1/Beast Era
 * Snarl
 * Slugfest
 * Saberback / Striker

Dinobots
 * Snarl

Velociraptor
Generation 1/Beast Era
 * Dinobot / Grimlock / Thrustor
 * Dinobot II / Rapticon
 * Razor Claw

Dinobots
 * Grimlock (Dinobots)

Pteranodon
Generation 1/Beast Era
 * Swoop (G1)
 * Graphy
 * Terrorsaur / Fractyl / Lazorbeak / Hydra
 * Terranotron (BM)
 * Reptix

Unicron Trilogy
 * Terrorsaur (Armada) / Ravenus
 * Swoop

Dinobots
 * Terranotron (Dinobots)

Animated
 * Swoop (Animated)

Dragons
Generation 1/Beast Era
 * Megatron (BW) / Cryotek
 * Deathsaurus
 * Galvatron (BWII) / Unicron
 * Nightscream (Classics) / Dragoyell
 * Savage
 * Snapdragon

Robots in Disguise
 * Megatron (RID)

Unicron Trilogy
 * Scourge (Cybertron)

Crocodylians
American alligator (Alligator mississippiensis)
 * Skullcruncher
 * Megatron (BW)
 * Terragator (partially)
 * Soundwave (BW)
 * Gatoraider

Turtles
Snapping turtles (genus Chelydra and Macroclemmys)
 * Snaptrap / Turtlar / Halfshell / Snaptrap (Energon)
 * Snapper
 * Terragator (partially)

Snakes
Cobras (genus Naja and others)
 * Cohrada
 * Quickstrike (BW) (partially)
 * Nightviper (even though vipers aren't cobras)
 * Cobrabreast

Lizards
Generation 1 / Beast Era
 * Geckobot
 * Sky Shadow (BW) / Drancron (partially)
 * Buzzclaw (BW) / Buzzclaw (Timelines) / Dirge (Descent into Evil) / Virulent Clone / Repugnus (Universe) (partially)

Frilled lizard (Chlamydosaurus kingii)
 * Iguanus (BW) / Crazybolt
 * Reptilion

Unicron Trilogy
 * Wreckloose

Birds
Eagles (order Accipitriformes)
 * Divebomb (G1)
 * Squawktalk
 * Eaglebreast
 * Silverbolt (G1) / Skywarp (BW)
 * Silverbolt (BW) / Windrazor (BW) (partially)
 * Screech
 * Dreadwing (Classics) / Wedge Shape

Condors (genus Vultur and Gymnogyps) Generation 1 / Beast Era
 * Laserbeak (G1) / Buzzsaw (G1) / Garboil / Sundor
 * Silverbolt (BW)
 * Blockrock

Unicron Trilogy
 * Laserbeak (Cybertron) / Hell Buzzsaw

Animated
 * Laserbeak (Animated)

Hawks and falcons (order Falconiformes) Generation 1 / Beast Era
 * Hawkbreast
 * Wingspan
 * Doubledealer / Doubleclouder
 * Airazor
 * Tigerhawk / Razorclaw (Universe) (partially)
 * Air Hammer (partially)
 * Sights

Unicron Trilogy
 * Airazor (Armada)
 * Divebomb (Energon) / Blackout (Energon)

Rodents

 * Rattrap
 * Packrat
 * Night Glider / Dark Scream

Bats

 * Batbreast
 * Mindwipe
 * Nightscream (BM)
 * Nightshriek / True One
 * Noctorro (partially)
 * Optimus Primal / Onyx Primal
 * Ratbat
 * Skar / Clouder
 * Sonar
 * Soundwave (BW)

Bears (genus Ursus)

 * Chainclaw
 * Grizzly-1 / Polar Claw / Survive
 * Icebird
 * Kuma Kinkin

Canines
Wolves / Dogs (Canis lupus)

Generation 1/Beast Era
 * Carnivac
 * Wolfang (Maximal) / Wolfang (Predacon) / K-9 / Max-B
 * Weirdwolf
 * Sixshot
 * Silverbolt (BW) / Windrazor (BW) (partially)
 * Quickstrike (BM)
 * Overbite (Classics) / Gredator / Razorclaw (Timelines)

Unicron Trilogy
 * Snarl (Cybertron)

Felines
Jaguars (Panthera onca)
 * Ravage / Glit / Howlback
 * Panther
 * Battle Ravage/Command Ravage
 * Jaguarbreast

Tigers (Panthera tigris)
 * Rampage (G1)
 * Snarl (Classics) / Apexis
 * Tigerbreast
 * Toraizer
 * Tigatron
 * Tigerhawk / Razorclaw (Universe) (partially)
 * Bantor (partially)

Lions (Panthera leo)
 * Angela / Dark Eggleo / Eggleo
 * Lio Convoy / Black Lio Convoy
 * Leobreaker / Nemesis Breaker
 * Lionbreast
 * Leonicus
 * Prowl (G1) / Lio Junior
 * Razorclaw (G1)
 * Lionizer
 * Snarl (BM) / Alpha Trion
 * Lione
 * Steeljaw
 * Under-3
 * Victory Leo

Pumas (Puma concolor)
 * Pounce
 * Quickswitch / Sixknight

Cheetahs (Acinonyx jubatus)
 * Cheetor
 * Cataclysm
 * CatSCAN

Sabertoothed cat (genus Smilodon)
 * Catilla

Elephants

 * Shuffler
 * Ironhide (G1) / Santon
 * Torca / Elephorca (partially)
 * Big Convoy / Black Big Convoy / Nemesis Prime (Universe 2003)

Rhinos
Generation 1/Beast Era
 * Headstrong
 * Ramhorn
 * Rhinox (BW)
 * Stranglehold
 * Greatshot
 * Rhinobreast
 * Top-Heavy
 * Rhino

Unicron Trilogy
 * Backstop
 * Rhinox (Armada)

Bovines

 * Tantrum
 * Bisonbreast
 * Horri-Bull
 * Bonecrusher (BW) / Bighorn
 * Noctorro (partially)
 * Longhorn (BM)
 * Ramulus / Longhorn (Universe)

Primates

 * Apache / B'Boom
 * Bantor (partially)
 * Optimus Minor
 * Simon Furman (in a Titan Magazine, Starscream joked that Furman was a Maximal).
 * Michael Bay (Hasbro made a toy of him, again as a joke).

Gorillas (Gorilla gorilla) Generation 1/Beast Era
 * Apeface
 * Apelinq
 * Beastbox
 * Optimus Primal
 * Primal Prime

Unicron Trilogy
 * Optimus Prime (Armada)

Go-Go-GoBots
 * Gorillabot / Beast-Bot / Gorilla-Bot