Nature Gear Window Bird Feeder $40.53 + Delivery (Free with Prime) @ Amazon US via AU
I was looking for a bird feeder for my balcony and came across these types that stick on windows. Never knew they existed before.
There are various designs available, but I like this one as it comes with a cut out viewing window, and has a removable tray. And come on, it's shaped like a freakin little house, can't resist that.
Now, I know there are some on eBay that look remarkably similar and priced a lot lower, but it's much harder to determine the quality as there aren't any reviews. I'm a bit more confident that this one will work as intended, supporting the weight of bird seeds and birds, due to the 1000+ Amazon reviews. Even a bloody squirrel fits!
I bought some Frankie and Friends wild bird seed to go along with this.