Dreams involving creatures like pterodactyls, especially when they take on human characteristics, can be quite intense and symbolic. Here are a few interpretations to consider:

1. Fear and Anxiety: The pterodactyl could represent an overwhelming fear or anxiety in your waking life. The act of it killing those around you may symbolize feelings of helplessness or being threatened by external forces.
2. Transformation: A half-human, half-pterodactyl figure might symbolize a transformation or conflict within yourself. It could represent aspects of your personality or emotions that you find hard to reconcile.
3. Loss of Control: The violent nature of the dream suggests a situation in your life where you feel a loss of control. This could relate to relationships, work, or personal challenges that seem chaotic or threatening.
4. Change and Evolution: Pterodactyls are ancient creatures, and dreaming of them might reflect concerns about the past influencing your present. This could indicate a need to address unresolved issues or to adapt to changes in your life.

Reflect on your current life circumstances and any stressors you may be facing that could be linked to this dream. It may be helpful to journal about your feelings or talk to someone you trust about your experiences.