saludos, estan son 4 fotos que han sido rechazadas por problemas de calidad, alguien me podria dar alguna recomendacion para que pueda mejorar la calidad de mis fotos, ademas de como poder identificar cuando la foto no es optima para subir a Adobe stock
As others have mentioned, you have focus problems. The reason for this, I'm afraid, is the quality of the lens I suspect. I see from the metadata that you have a Canon Rebel—a good camera—but the kit lens that comes with it is of poor quality—this is connected to the price, of course. So, this results in the subject - your owl, caterpillar, etc.- not being sharp. If you want to continue uploading stock photos, you should try to get a better lens. Sigma for example makes lenses with a Canon mount. This will take some research and reading. This would be my recommendation.
I am assuming that you are using the lens that came with your camera judging by your photos.
NOTE: You're competing with over 10 million high quality bird images. To be accepted, yours will need to be uniquely better than what Stock has now. I fear that's a very difficult challenge even for an expert. Find another subject that has less competition.
Closely examine images at 100-300% magnification (zoom). Correct what you can in Photoshop or Lightroom. Discard the ones you can't correct. Submit only your finest work to Stock.