No such thing as hot or cold blooded.

You have:

    Endothermic: Generating internal heat to moderate body temperature, e.g., modern birds and mammals.

    Ectothermic: Relying on the environment and behavior to regulate body temperature, e.g., typical reptiles.

    Homeothermic: Maintaining a constant internal body temperature, e.g., modern mammals, birds, and some others.

    Poikilothermic: Having a fluctuating internal body temperature depending on the local environmental conditions, e.g., typical reptiles and actinopterygiian fish.