pharaoh ant
US /ˈfeɪ.roʊ ˌænt/
UK /ˈfeɪ.roʊ ˌænt/

1.
a very small, yellowish-brown ant (Monomorium pharaonis) that is a common household pest, known for infesting buildings and being difficult to eradicate
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We had to call an exterminator because of a severe pharaoh ant infestation in the kitchen.
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Pharaoh ants are known for nesting in warm, hidden areas, making them hard to spot.