Would mosquitoes feed on free blood as an easy source of nutrients? They home in on veins by means of infrared light (heat detection). Also, blood needs to be in liquid form. So would they feed on anticoagulant-treated blood kept at 37oC? Or is there some physiological phenomenon that mosquitoes necessarily need to pierce something to draw in blood?
I am asking this, because just keeping a vial of blood at the end of a room might save us from mosquito bites.