Three crows are supposed to guarantee a letter (I assume one consisting of pages with words written on those pages and not just a random letter 'L' or 'R' or what have you).
But the three crows I saw on my walk to the harbour had different ideas. Well, at least one of them did. That one crow wanted to play, er, 'aircraft carrier' with the other two, and land on the aft deck with hook extended. Neither of the other crows were in the mood, and a great ruckus filled the wetland. This advancing and rebuffing occurred along the mudflat for quite some time, and only came to a halt when a passing bald eagle began to circle. Caution then prevailed over l'amour.
By the way, wishing to add a photo or two of the walk I was on for this blog, I searched the Internet. And I find myself renewed in the belief that you can find anything there. Here is a YouTube video of my exact walk (except its from a bicycle). I am not this fast, and always perch at a lookout in both the coming and the going.