Insect and Spider Identification: Many mosquito-like insects in home (Southern California), 1 by motoxxbiker

motoxxbiker wrote:
I've been seeing a good amount of these insects that resemble mosquitoes in my house lately. They are prevalent at night and I seem to kill at least 3-4 every night. Can anyone help identify if these are a concern? I believe they are breeding from a water source but I don't know where that would be (I've checked plants/soil in the house and we don't have standing water anywhere). I am however, suspicious of a shower drain as they seem to like that particular bathroom.

Thanks for the help!