Mallard takes off

The female mallard in flight is delightfully beautiful despite subdued colors. Fits well into the surroundings.  

I must admit that I have probably received a little help from AI here. I have extended the image upwards to create a bit more space between the upper wingtips and the edge of the image.

However, I have not altered the mallard. But what is AI, and what is just regular Photoshop? 

Not easy to know in these days.