| 100% | ARENT | 5 | Birds ___ Real (mock conspiracy theory that states birds no longer exist and have been replaced with drones) |
| 33% | ARENT | 5 | "Birds ___ real" (conspiracy theory claiming that common animals are drones) |
| 30% | EUROS | 5 | What marks and francs have been replaced with |
| 28% | ERG | 3 | Unit of energy, work or heat that has not been officially valid since January 1, 1978 and has now been replaced with nanojoules |
| 28% | PIGEONEXPOSE | 12 | Shocking article proving the conspiracy theory that birds aren't real? |
| 27% | DODO | 4 | Extinct bird that has become synonymous with being obsolete |
| 26% | IMNOTADOCTOR | 12 | With 40- and 48-Across, much-mocked ad phrase that could have been said by the answers to the four starred clues |
| 26% | EAGLE | 5 | Bird that has been used by the Dutch police to take down illegal drones |
| 26% | JELLY | 5 | Fruit-flavored dessert that is made with gelatin and requires no baking |
| 26% | LANAI | 5 | Hawaiian island that has no traffic lights and is home to Manele Bay |
| 25% | ARENT | 5 | Birds ___ Real (satirical conspiracy theory) |
| 24% | RES | 3 | ___ judicata (case in which there has been a final judgment and is no longer subject to appeal) |
| 24% | MIGRATORY | 9 | *37a was a type of ___ (nomadic) bird that traveled long distances and was used to send messages. |
| 24% | PHEASANT | 8 | A long tailed bird that is often hunted as game (rhymes with "pleasant") |
| 24% | ASS | 3 | Working animal that resembles a horse but is smaller and with longer ears |
| 24% | ANTEATER | 8 | Toothless termite hunter with a long nose and a tongue that can be up to 2-feet long |
| 24% | JANE | 4 | With 35-Down, fictional heroine who says "I am no bird; and no net ensnares me" |
| 23% | WORLDSFAIR | 10 | International exposition that has been hosted by the United States in 18-Across, 28-Across, and 32-Across (2 wds.) |
| 23% | MACAW | 5 | "I'm a loud, colorful bird with a long lifespan, and I mate for life. Who am I?" |
| 23% | SWAN | 4 | With 36-Across, Tchaikovsky ballet that was a highlight of 18- and 46-Across's long professional partnership |
| 23% | VESTIGE | 7 | Remnant of something that no longer exists |
| 23% | OATH | 4 | Word that might be replaced with symbols |
| 23% | LEMUR | 5 | Primate with large eyes and a long tail that is endemic to the island of Madagascar |
| 23% | STOPMAKINGSENSE | 15 | No longer be comprehensible ... and, with its first word divided in three parts, a hint to how to read this puzzle's title |
| 23% | POMERANIAN | 10 | Toy from a place that no longer exists |
| 23% | KNITCOSTS | 9 | *Price tags that have been crafted with yarn? |
| 23% | MACRO | 5 | Prefix that becomes its opposite when its second letter is replaced with I |
| 23% | ORANGE | 6 | Putting an ___ in stockings, Christmas tradition of using a citrus fruit as stocking stuffers that is now replaced with gadgets and toys |
| 23% | ROLLINGSTONE | 12 | Biweekly pop culture magazine that has been in publication since 1967 and shares its name with a legendary rock band: 2 wds. |
| 23% | DIRTYOLDMENUS | 13 | Diner handouts that should have been replaced years ago? |