I know that title looks like I don’t know the difference between two and too but in this case two is the proper usage.
The challenge was to use at least two different blues in your artwork. I used way more than two. :)
After I got all the background finished it looked like a sky to me. Since I have some fun bird on a wire washi tape I painted in some telephone poles so they’d have somewhere to perch. The plane was an afterthought but I think it was needed to give some depth to the page.
I imagine myself laying on the ground, listening to the birds in between planes coming in for a landing at the nearby airport.