Usually a cockroach. “Waterbug” is a nickname New Yorkers commonly use for large cockroaches rather than a species identification, which is exactly why this page exists: the inspection that follows depends on what it actually is.
What is worth noticing, in order
- Size, roughly, against something familiarA large roach an inch or more long and reddish-brown is a different animal from a small light brown one about half an inch long with two dark stripes just behind the head. NYC Health associates American cockroaches with moist basements and lower floors, while German cockroaches are found throughout homes.
- How many, and whereOne insect seen once in a bathroom late at night points somewhere different from several seen repeatedly around kitchen appliances.
- Whether any are small versions of the same thingSeeing multiple immature roaches can be evidence of local breeding activity rather than something that wandered in.
What one sighting does not prove
What we would not do is tell you that one sighting proves where the insect came from. A large roach in a bathroom does suggest looking at drains, basements and utility spaces first. Multiple small ones around a kitchen suggests something else. Those are inspection priorities, not conclusions, and getting it wrong sends the treatment to the wrong place.
The single most useful thing you can do
Take a photo with something in frame for scale. A coin, a key, a fingertip. Identification changes what gets inspected, and a clear photo usually settles in seconds what a description argues about for a week.
What to tell your building
Attaching a photo. Seen in the bathroom, twice this week, both times at night. Let me know if you need anything else.
Pest control in an apartment building requires treatment, repairs, access and information working together. See how the pieces fit.
Send this to your building
If other apartments have the same problem, one message to your super or managing agent does more than ten calls about one unit. Copy this and send it however you already talk to them.
Edit it before you send if you want. No sign-up, nothing collected, and we do not see who you send it to.
Sources
We are a pest control company working in Bronx and Brooklyn apartment buildings, and this is general information rather than advice about your apartment or your lease. Where our sources conflict with each other, we say so on the page rather than picking one quietly.