Missing a specific horn? Look at the full list and then just search for the missing horn in the guide!
The water-upgrade and the jumping-ability are recommended.
Note: Some images could not be displayed in the guide. In that case, there is a link to a picture.



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Duck Duck Toot:
On an island in the beach-area.

Ye Olde Hooterer:
Hidden at some moving trucks in the suburbs.

Eau De Kaubocks:
At this street in the beach-zone.

Crasher:
At the Memorial.

No Carrier:
In the DMV-station.

Shredocaster:
In the woods at the beach.
Link[i.imgur.com]

Rotarizer:
Hard to miss - in a mission, surrounded by planes!

Zzzzzap!:
In an alley in the beach-zone.

Ol' Chewchops:
Top right corner of the suburb-zone.

The Flusher:
On top of a Limorama in Chinatown.
Link[i.imgur.com]

The Coach:
Hidden at the first mission of the mountain-zone.

Zap-O-Matic:
At the exit of the mall.

A Horn for Ants:
On an island on the right side of the mountain-zone.

The Time Out:
On a building near the docks
Link[i.imgur.com]

Party Like It's 1979:
On a cliff on the left side of the mountain-zone. The airport is nearby.
Link[i.imgur.com]

Alarmed:
Hidden between some buildings in the beach-zone.

Drake Whistle:
In a hall at the airport.

Falarafanfare:
On an island in the beach-zone. It's far out!

Intensive Care:
Near the ice on a rock in the mountain-zone. Reach it by climbing up the stairs to the left!

Honk, She Wrote:
Near the bridge which leads to the suburbs-zone.

Pope's Crops:
On the upper left of the mountain-zone.

The Librarian:
Behind the mall - you have to jump onto it in order to get there!
Link[i.imgur.com]

John Farmer 300EX:
Near the bridge which leads to the suburbs.
Link[i.imgur.com]

Indiana:
In the sea in the suburbs-zone.

Awesomeness Detector:
On top of the last Limorama in the game. And yes, this horn has no sound.

The Duo-Horn:
Hidden in the trees near the Limorama in the beach-zone.

Clown College Horn:
On the island in the sea in the suburbs-zone.
Link[i.imgur.com]

Baby On Board:
In the bottom left corner of the suburbs-zone.

Cat in a Box:
In the water near the island in the suburbs-zone.

Printotron 2000:
Hidden in the beach-zone behind some trees.
Front 9:
Behind the DMV-station (behind the brick wall!)

The Gong:
On top of the school.

Some Horn:
Near the demolition derby in the mountain-zone.
Link[i.imgur.com]

Captain Dan's Horn:
Near the shortcut in the beach-zone.

Suction Cups:
On the road to the tunnel leading to the mountain-zone.

All Aboard:
In the sea in the mountain-zone.

The Jeffery:
Near the Limorama on the junkyard.
Link[i.imgur.com]

Flatutron 1999:
On the road down the DMV-station.
Link[i.imgur.com]

Truck Simulator:
On the tallest mountain in the mountain-zone - work your way up there!
Link[i.imgur.com]

Quiet Bell:
Behind a house in the suburbs-zone.
Link[i.imgur.com]

Steak Factory:
In a river in the mountain-zone.

Forgetful Joe:
In a garden in the suburbs-zone. It really is easy to forget...
Link[i.imgur.com]

Gargle Blaster:
Near the road, where Ronaldo challenges you.

Laser Blaser:
On a cliff in the beach-zone.
Link[i.imgur.com]

Sneezer:
On a bridge in the mountain-zone.

Sneezer Jr.:
Near the villa in the suburbs-zone.
Link[i.imgur.com]

A Birdhouse:
Between the mall and the tunnel to the beach-zone.

Whiplash:
At the end of the rails in the mountain-zone.

More Jeffery:
Under the water between some rocks.