I put some thought into mine.
Sidewinder - AHOLEHOLE - Aholehole is pronounced “ah-holy-holy,” and is the name of a species of Hawaiian flagtail fish native to the central Pacific.
Viper Mk 4 - ASSAPANICK - While exploring the coast of Virginia in 1606, Captain John Smith (of Pocahontas fame) wrote in his journal of a creature known to local tribes as the assapanick . By "spreading their legs, and so stretching the largeness of their skins," he wrote, "they have been seen to fly 30 or 40 yards." Assapanick is another name for the flying squirrel.
Cobra Mk 3 - SKIDDY-KOK - Billcock , brook-ouzel, oar-, velvet runner, grey-skit, and skiddy- are all old English dialect names for the water rail, a small and notoriously elusive wading bird found in the wetlands of Europe, Asia, and north Africa.
Vulture - DIK-DIK - Standing little more than a foot tall at the shoulder, the dik-dik is one of the smallest antelopes in all of Africa. Their name is apparently an imitation of their alarm call.
AspX - SEXANGLE - Both sexangle and the equally indelicate sexagon are simply old 17th century names for what is otherwise known as a hexagon, a plane geometric shape with six sides. The prefix sexa– is derived from the Latin word for "six" rather than its Greek equivalent, heks.
Python - SHEET - was an old Middle English word for a sail, and in particular the foremost sail on a ship. A mast, ultimately, is a ship’s foremast, while the sheet or sail is the sail attached to the ship’s mast.
Imperial Clipper - JACULATE - Jaculation is the act of throwing or jostling something around, while to jaculate means "to rush or jolt forward suddenly."
FDL - KUMBANG - Like the haboob, the kumbang is another hot, arid wind, in this case one that blows seasonally in the lowlands of western Indonesia.
FDS - GULLGROPER - To grope a gull is an old Tudor English expression meaning "to take advantage of someone," or "to swindle an unsuspecting victim"—and a gullgroper does just that.
Anaconda - NOBBER - In early 19th century English, boxers were nicknamed nobbers, a name apparently derived from the earlier use of nobber as a slang name for a punch or blow to the head.
Imperial Cutter - WANKAPIN - Wankapin, or water chinquapin, is another name for the American lotus, Nelumbo lutea, a flowering plant native to Central American wetlands.