Here is Courier Drone that can Fly or Drive to your Doorstep to deliver packages

Advanced Tactics has successfully tested delivery with a drone, the Panther sUAS Air/Ground Robot that can both fly and drive up to your door. When it’s too dangerous or costly to travel by air, the machine just has to touch down and wheel its way to its destination. It promises more considerate (not to mention less theft-prone) shipping to homes and offices, and it could also lead to faster deliveries in areas where no one transportation method is particularly speedy.

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The Panther drone isn’t a heavy-duty hauler when it can only carry 15lbs, and its range is limited to 10 miles when on the ground (flying range isn’t mentioned, but it only flies for 5-10 minutes). However, it can handle attachment that extends its usefulness well beyond getting products from A to B. You can add a camera and video screen for telepresence, or sensors if you’re using it to study nature or construction projects. You can even add robot arms to grab samples or unload supplies.