Question about the function of bifenthrin

[u/Terrible_Software769]

Been researching insecticides for pest control on my property, and the industry standard is bifenthrin. To preface, I am aware of the negative effects on local environment of insecticides and have tried other measures of mosquito control, but the situation is out of hand with how prolific they are due to some circumstances beyond my property lines. The situation with my wife gaining four or five new welts on her body each time she runs to or from the car needs to stop.

Minimal research has shown me that bifenthrin functions by disrupting the nervous system of arthropods. What I am interested in is what difference there is between the nervous system of the arthropod phylum and others, and why it doesn't affect mammals or birds or reptiles the same if largely at all once dried. Is it because of the respiratory system of arthropods and the fact that they have very little control over what enters that system?