Join BirdNote tomorrow, November 30th!
Illustrator David Sibley and actor H. Jon Benjamin will face off in the bird illustration battle of the century during BirdNote's Year-end Celebration and Auction!
When ‘Terror Birds’ Ruled the Earth
Titanis walleri would have been frightful indeed!
© Stephanie Abramowicz
A bird known as Titanis walleri made its home in Florida just a few million years ago. Titanis, as its name suggests, was titanic indeed — a flightless predator, 5 feet tall, with a massive hooked bill. Titanis and other birds related to it belong to a group some paleontologists call the "terror birds." They were dominant land predators in South America for tens of millions of years. Paleontologists still aren’t clear about why Titanis and its kin went extinct. But whatever factors ended the era of the terror birds also made it a lot less risky to go out and fill your bird feeder.
BirdNote®
When ‘Terror Birds’ Ruled the Earth
Adapted from a script by Bob Sundstrom
This is BirdNote.
With the arrival of winter weather, we extend a helping hand to birds by filling up our feeders and birdbaths.
[Eastern Bluebird singing; Swamp soundscape]
But, looking back in time, there were some birds we would have been less eager to invite into our yards. One such bird was Titanis walleri, which made its home in Florida just a few million years ago. Titanis, as its name suggests, was titanic indeed — a flightless predator, five feet tall. They were swift hunters that could chase down fast-moving mammals, then tear them apart with a massive hooked bill.
[roar]
They likely preyed on animals as large as deer! Titanis and other birds related to it — a group some paleontologists call the “terror birds” — were dominant land predators in South America for tens of millions of years.
[roar]
Paleontologists still aren’t clear about why Titanis and its kin went extinct. But whatever factors ended the era of the terror birds also made it a lot less risky to go out and fill your bird feeder.
[Eastern Bluebird singing]
For BirdNote, I’m Michael Stein.
###
Senior Producer: Mark Bramhill
Producer: Sam Johnson
Managing Editor: Jazzi Johnson
Managing Producer: Ariana Remmel
Content Director: Jonese Franklin
Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York. Recorded by TK
BirdNote’s theme was composed and played by Nancy Rumbel and John Kessler.
© 2025 BirdNote December 2025
Narrator: Michael Stein
ID# titanis-01b-2025-12-26 titanis-01b
Reference:
https://www.floridamuseum.ufl.edu/florida-vertebrate-fossils/species/titanis-walleri/
Bob Sundstrom
Writer
