Work vehicle and work vehicle system

A work vehicle system, comprising:

• an unmanned aerial vehicle;
• and
• a work vehicle including:
• a takeoff and landing section on which the unmanned aerial vehicle is capable of taking off and landing;
• a travel device supporting the takeoff and landing section and capable of traveling on ground;
• a tilt acquirer configured or programmed to acquire a tilt angle of the takeoff and landing section from a horizontal plane;
• and
• an attitude adjustment mechanism to adjust an attitude of the work vehicle in accordance with the tilt angle acquired by the tilt acquirer, such that, in a case where the tilt angle is equal to or more than a threshold, the attitude adjustment mechanism is operable to adjust the attitude of the work vehicle to reduce the tilt angle below the threshold.

A work vehicle capable of performing unmanned travel over a travel surface, the work vehicle comprising:

• a body;
• a travel device supporting the body and capable of traveling on the travel surface;
• a work device fixed to the body;
• and
• an attitude adjustment mechanism to adjust an attitude of the body;
• the work device being adjustable in attitude as the attitude adjustment mechanism adjusts the attitude of the body.