When you kill a stag, you get an entry for antelope.

When you kill an elder antilope, you get an entry for elder stag.

The entry elder stag shows the image of an antilope.

The entry of elder stag has no text.

This is also true for other languages. (I play in german)

I want to add that engagement and disengagement attacks are not explained in the cyclopedia.

These are importand combat mechanics and they are unknown from other games.