Yes, you can post without a prompt, Annie! The prompts are just to encourage engagement and creativity. In fact, these photos are not in response to a prompt — simply photos I took over the weekend and wanted to share.
I have an older mid-range Canon PowerShot with the standard zoom lens. I love to take photos but don’t know much about cameras! Some of these photos were taken with my Samsung Note 8 phone though — the mallard duck and the last photo of the unknown bird were taken with my phone.