Crow's Nest (BTD4-BTD5)

"Allows the buccaneer to detect and target Camo bloons. Does not grant detection to other towers."

- BTD5 Description

Crow's Nest is an upgrade for the Monkey Buccaneer that was first introduced in Bloons TD 4, and later added to Bloons TD 5 and later games.

In BTD4, this upgrade allows detection of Camo Bloons for any tower in the radius. It is good for those early rounds with Camo Bloons if players don't have any other tower or upgrade that is able to detect them. In Bloons TD 5, this upgrade only allows the Monkey Buccaneer itself to detect Camo Bloons unless a Tier 3 Pirate Cove is active. In BTD6, it is very similar to BTD5 (see this page for more details).

Bloons Tower Defense 4
In Bloons TD 4, this upgrade is the 2nd upgrade for the Monkey Buccaneer. It costs $130 on Easy, $150 on Medium, and $160 on Hard. Of course, it allows camo detection for the Buccaneer as well.

Bloons Tower Defense 5
In Bloons TD 5, this upgrade is the 2nd upgrade of Path 2 for the Monkey Buccaneer. It costs $210 (that or $215) on Easy, $250 on Medium, $270 on Hard, and $300 on Impoppable. Unlike Bloons Tower Defense 4, The Crow's Nest does not give Camo detection to other towers (this is unless the player decides to use the Specialty Building Pirate Cove tier 3).

Trivia

 * In BTD5 and BTD5 Deluxe this upgrade does not allow Camo detection for all towers, unless a level 3 Pirate Cove is active. This is because upgrades in Bloons TD 5 and Bloons Tower Defense 5 Deluxe that allow Camo detection have changed to only let the tower who bought it be able to detect Camo.
 * Due to this, if players have a Tier 3 Pirate Cove and a 4-2 Aircraft Carrier, every tower on screen gets Camo detection due to the infinite range of the Aircraft Carrier.