Click on the 'Share' icon, select BBCode, then copy all the text and paste it here. Delete the last two lines if all you want is the image.
It looks like this when you paste it, but you only need the first line.
(url=https://flic.kr/p/2iZ1hqL)(img)https://live.staticflickr.com/65535/49871853132_4e6ce887a9_b.jpg(/img)(/url)
(url=https://flic.kr/p/2iZ1hqL)IMG_20200503_114535(/url) by (url=https://www.flickr.com/photos/186995021@N02/)Stuart Gray(/url), on Flickr
(Square brackets replaced with regular ones.)