An Ear to the Ground

 is an unmarked quest in Fallout: New Vegas.

Quick walkthrough

 * Travel to Camp Forlorn Hope and enter the Barracks.
 * Speak to Private Sexton and agree to help boost the camp's morale.
 * Obtain Legion ears from deceased Caesar's Legion soldiers and return them to Private Sexton.

Detailed walkthrough
Simply kill any Legion soldiers and bring back the ears to turn in.

The objective is to kill as many Legion soldiers as possible. The best way to do this is to activate the quest, and then do Restoring Hope. After you have returned about 30-40 ears, Private Sexton will give you a reward. This reward may include a number of beers and 100 caps. After the award has been given, you can not collect "Legion ears."

Rewards

 * NCR fame.
 * There is bonus applied to the third part of Restoring Hope. Every 10 ears turned in adds a morale bonus of 1 for a maximum of three. This bonus is applied to the Nelson attacking forces.
 * After you have turned in enough ears, you will also receive a number of beers and 100 caps.

Note

 * Due to Sexton not needing to be killed in We Are Legion, it is possible to give him ears for reputation, even if the rest of the camp is dead.
 * The amount of ears collected will be represented as tally marks in the mess hall. There is also a bull with the initials of Caesars Legion above it. These marks stop at 30 ears, no matter how many you've turned in.
 * With few exceptions ears won't start appearing on legion corpses until speaking with Private Sexton.