Yes, they are described as wingless dragons. This means that dragonbane weapons like the dragon hunter lance will work on them. The dragon crossbow is going to be very effective too when you are going to kill them.  On average, going with a dragon hunter lance or a dragon hunter crossbow with Diamond dragon bolts (e) is going to kill drakes about 10 to 15$ faster due to the special effect these weapons have on draconic creatures. Despite them being dragons, you can not swap out the task for another chromatic dragon task. They also do not have a boss monster that you can kill instead of doing the regular drakes in the dungeon.