* AccidentallyCorrectZoology: In one episode, Eliza states that alligators are "the closest things to a living dinosaur", when it should be known at that time that birds are living descendants of dinosaurs. Nowadays, Eliza would be correct in that birds are classified as true dinosaurs, and their closest living relatives are the crocodilians.
* ActingForTwo: Creator/TimCurry not only voices Nigel Thornberry, but also his father Col. Radcliffe.
* AdoredByTheNetwork: Despite being moderately popular at best when it first aired, Creator/{{Nickelodeon}} pushed it as one of their most valuable commodities, airing it any time they could and even greenlighting two theatrical movies. But they both underperformed.
* CelebrityVoiceActor: Donnie is voiced (well, as "voiced" as [[TheUnintelligible Donnie]] gets, anyway) by [[Music/RedHotChiliPeppers Flea.]]
* TheDanza: Donnie's full name is Donald ''Michael'' Thornberry; Flea, his voice actor, was born as ''Michael'' Peter Balzary.
* KidsMealToy: Burger King sold a set of four toys in their Kids' Meals in 2000, including a treehouse slide.
* MissingEpisode: Three episodes are missing from Paramount Plus for whatever reason- "The Kung and I", "The Legend of Ha Long Bay" and "Gem of a Mom".
* TheOtherDarrin: Biederman was variously voiced by Creator/MichaelJeter or Jerry Sroka.
* PlayingAgainstType: For once, Creator/TimCurry voices a character who's NOT a homicidal maniac.
* ScrewedByTheNetwork: The series had a two-episode grand finale, but the second part wasn't aired until over a year after the first one. When they did air the actual last episode, it was without much advertisement and most viewers weren't aware of it.
* StarMakingRole: While Creator/TimCurry already did plenty of voice acting beforehand (such as ''WesternAnimation/PeterPanAndThePirates'', ''WesternAnimation/FernGullyTheLastRainforest'', and ''WesternAnimation/{{Duckman}}''), Nigel Thornberry was the role that truly launched him to stardom in this field. And it, ironically enough, wasn't a villainous character like he usually plays.
* TieInCereal: ''The Wild Thornberrys'' had a cornpuff and marshmallow cereal called "Wild Thornberry's Crunch".
* WhatCouldHaveBeen: Originally, the show was going to be focused entirely on the "Nigel Thornberry's Animal World" ShowWithinAShow, and was an adult-aimed educational program akin to Creator/DavidAttenborough's ''The Living Planet''. This version of the show was originally pitched to Creator/{{Fox}}, and while Eliza was still present, she wasn't the protagonist. Additionally, Darwin was named Bobo and the Thornberrys also had a dog named Monty.
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