Birds aren't stupid as hunters and they see really really well.
Them whirrling noisy blades are going to be a form of natural bird deterrent.
Next, the copters can fly on 3 propellers operating, this is the service performance margin on the device.
In short, it will work .....
Why will AMAZON continue to pursue this?
WHY ARE UPS AND FEDEX PURSUING THIS?It costs $5 per package now to deliver by truck, driven mostly by fuel and employee wages.
People will pay for convenience and for those towns with air drone hubs the local delivery cost is mainly electricity and drone maintenance.
What you will see is UPS installing an air hub in each city they currently keep any kind of sorting facility. Ditto for FedEx.
Within 2 years, every city will have an air drone hub.
Within 2 years, you will be doing the "pick the package up in back yard" deal too. You will simply go to the spot (+/- 3 yards) that is tree free that is inside your fence, crank up the phone app for the delivery service and let your phone tell the service the exact GPS coordinates of where you want the packages to always land.
Women LIKE instant gratification. Women will want this sort of service from WalMart, from the grocery store, etc.
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Paradim shift time ---- why even have a retail store when everybody wants instant delivery?
Go shopping, see something you want, price check it at Amazon and then have it sitting in the back yard by the time you get home .....
..... the future, she comes .....