karakulak and yataghan. I think in Turkey sometimes karakulak is used as a name to describe the ear shaped hilt of yataghans ,right. I used both names to define just the hilt models of the daggers in the picture, according to the nuances between the samples. The blades of the samples are sure can not be related to yataghans. Only the hilts. karakulak - black ear trasnlation is correct. I name the longer sample as karakulak, and the shorter as a more classical yataghan according to just my understanding. (Hilt of the long sword seems a perfect yataghan type too).
In Balkans and Bulgaria especially - as far as I know) karakulak hilt form was widely used on yataghan blades.(the form of the longer dagger) , and they call the weapon only "Karakulak" , instead of "Yataghan". Correct?
About the ears, an addition.
http://www.oriental-arms.com/item.php?id=1551
this type is called "esekkulak" , which means "donkey ear")