As long as the photos remain unaltered and you mention my website or a link to it you are welcome to use my photos in your blog, website, social media, etc for non-profit purposes.
If you would like to modify my photos for non-profit or personal use, please contact me before doing so. Most likely, I will have no problem with this as long as you are respectful of the photos and the work behind them. I will be more than happy to discuss your project with you, and can even contribute higher resolution photos.
I have high resolution formats of all photos displayed in this website (vary according to the camera used). I am happy to discuss any kind of commercial use of my photos, just write me at firstname.lastname@example.org