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[[folder: Fridge Brilliance ]]

* In-Universe example: Nigel and Marianne spend one episode trying to film the bird-eating spider. However, Marianne is frustrated at how many of Nigel's turns appear to be false, instead leading them to other prey-species that are apparently dead-ends. However, Nigel points out that the Bird-eating spider rarely eats birds [[ShownTheirWork (Which is actually true!)]] and that by finding the species that the spider ''primarily'' dines on, they'll be much more likely to find the spider than if they followed birds.
* Eliza's ability to talk to animals makes her a sort of Dr. Doolittle. Which, in a way, makes her [[Theatre/MyFairLady Eliza Doolittle.]]
* In the flashback to when Donnie first joined the Thornberry family, neither he nor his adopted orangutan mother hesitate to trust Nigel even for a second. They can't understand that he and his family are filming wildlife for conservation efforts...but what they can see is a ''bearded man'' in khaki safari gear with a similarly-dressed wife. They even have children who are happily playing with another, smaller ape. The oranguatan mother--and, perhaps subconsciously, Donnie--knew to trust Nigel because he and his family reminded them so much of Michael and his.

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[[folder: Fridge Horror ]]

* So Eliza can talk to animals and just generally understand their speech, and her parents film a nature documentary. What happens whenever they film footage of a predator killing and eating its prey? Imagine what something like, say, the sea-turtle hatching season - in which a LOT of the baby sea turtles get picked off by birds and crabs and other predators before they even reach the sea sounds like to her? Of course she rarely sticks near her parents when they are filming but she must have experienced this sort of thing at some point in the wild just by happen-stance anyway.
* Mating season, both in the wild and in nature documentaries, as heard by Eliza. Imagine walking through a forest and suddenly you hear what sounds like a porno, made even more awkward by not being able to tell if it's coming from humans or animals, since animals sound like humans to her.
* Debbie's attitude likely stems from a form of deep social isolation. She's often on her computer, secluded from her family, but that just means she might be chatting with online friends or absorbed in her own hobbies as means of distraction from loneliness. She had to grow up constantly moving around from what can be assumed to be a young age, meaning she was never able to make any long-term real life friends or socialize in a normal way. On an even less pleasant note, she also had to go through puberty and have all the urges and needs of a developing teenage girl and essentially zero privacy since she lives in an RV with her entire family. Her parents love her but have basically denied her any sense of privacy, personal space or control over her own life. No wonder she's moody and has little interest in people.
* Eliza has a shocking low self-preservation instinct considering what her parents do for a living. On ''several'' occasions, she's nearly gotten herself and others killed because she ran into animals that didn't care that she could talk to them or that she wanted to be friendly.
* A double whammy with the SadisticChoice from the movie. Eliza is ''very'' lucky that the poachers kept their word to let Debbie go when she admitted how she knew about their plans; just imagine how much more messed up she would have been if they had killed Debbie anyway. And while Eliza does get her gift back by the end of the movie, imagine the guilt Debbie would have carried if Eliza had lost it forever...
* If the Thornberrys ever went back to a "normal" life, Eliza would probably keep up her "go off looking for animals when I'm upset" habit even in a city...meaning she would be exposing herself to various criminals who [[WouldHurtAChild would have zero issue threatening or harming her]] and wouldn't even have the possible "huh; you're interesting" that some dangerous animals experienced when meeting a human who could speak their language.

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[[folder: Fridge Sadness ]]

* While it's indeed heartwarming that the last two Galapagos Tortoises mated... all Eliza and the others did was delay the inevitable: The species will still go extinct anyway. Sure, there's another generation, but any mating pairs from this generation will be ''siblings''. The only mitigating factor is that sure, Galapagos tortoises live for a ''very'' long time (up to 175 years in captivity) but even then, at some point in the future the species will be declared extinct.
** Similarly, what if the tortoises are infertile due to how old they were?