#xkcd No. 3204
Date: 2026-2-6
Title: Dinosaurs And Non-Dinosaurs
Alt text: Staplers are actually in Pseudosuchia, making them more closely related to crocodiles than to dinosaurs.
https://xkcd.com/3204/
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![Description:
A 2x2 matrix categorizes silhouettes based on two axes: "Are Dinosaurs" vs "Are Not" and "Seem Like Dinosaurs" vs "Don't Seem Like." It contrasts prehistoric beasts, birds, and random objects.
Transcript:
[The image displays a 2x2 grid chart with column and row headers.]
**Column Headers:** ARE DINOSAURS, ARE NOT DINOSAURS
**Row Headers:** SEEM LIKE DINOSAURS, DON'T SEEM LIKE DINOSAURS
**Top-Left Quadrant**
*(Intersection: Are Dinosaurs / Seem Like Dinosaurs)*
[Silhouettes of classic prehistoric dinosaurs: A Stegosaurus, a Triceratops, a Tyrannosaurus Rex, a large Sauropod (long-neck), and a smaller Raptor.]
**Top-Right Quadrant**
*(Intersection: Are Not Dinosaurs / Seem Like Dinosaurs)*
[Silhouettes of prehistoric reptiles often mistaken for dinosaurs: A large marine reptile (Mosasaur), a standing Pterosaur (Azhdarchid), a flying Pteranodon, a long-necked Plesiosaur, and a sail-backed Dimetrodon.]
**Bottom-Left Quadrant**
*(Intersection: Are Dinosaurs / Don't Seem Like Dinosaurs)*
[Silhouettes of modern birds (which are scientifically classified as avian dinosaurs): A penguin, a heron, an ostrich, a pigeon, and a flying seagull.]
**Bottom-Right Quadrant**
*(Intersection: Are Not Dinosaurs / Don't Seem Like Dinosaurs)*
[Silhouettes of random objects and beings: A squirrel, a stapler, a pineapple, a human stick figure, and a bicycle.]](https://me.ns.ci/system/media_attachments/files/116/025/304/244/738/278/original/8975c11f82aa6c23.png)