Use the "static.flickr.com" URL to get direct displays, e.g., <img src="http://static.flickr.com/57/186012618_3d99e09ddc.jpg">. This is what ohiblather uses on the flickr pictures she displays directly on lj. You can pick up the URL (using Internet Exploder, anyway) by right-clicking on the picture in the flickr album, and then selecting the properties item from the pop-up menu.
no subject
It is a lovely-looking canoe!