To photograph birds, you need the longest lenses possible. Here’s a little example. This lovely Common Starling was just across the narrow, one-way road from my balcony. The longest autofocus lens I have at home is a 300mm. This gets you further on the slightly smaller sensor of a lot of cameras than on a traditional 35mm camera (you can imagine the smaller sensor as taking a piece out of the middle of what you’d see in 35mm).
But even at such a short distance with a lens of an order of magnitude greater than any phone posesses, the second pic shows the result - with the bird taking up a tiny portion of the frame (the edges on either side are cropped off just for a better aspect ratio - so the bird takes up even less of the original). The first pic is heavily cropped.
So if you want to take pics of birds, viable focal lengths really start at 500mm.