Cockroaches love darkness and are afraid of light. Turning on the electric light will scare them away immediately. Cockroaches like to lie down during the day and go out at night. After dusk, they begin to climb out of activities and feed, and return to their nests in the morning. During the day, they hide in dark places, and at night, especially after the lights are turned off, they go out for activities, or feed, or seek a mate.

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Cockroaches lie down during the day and come out at night, showing obvious circadian rhythm. It was observed that Blattella germanica started its activity at 19, with a peak at 2 1-22, and a small peak appeared at 2: 00 am the next day and disappeared at 5: 00. Periplaneta fuliginosa started the activity on 19, with a peak at 20: 00, two small peaks at 23: 00 and 2: 00 the next morning, and the activity ended at 4: 00 a.m.

Cockroaches are omnivorous insects with a wide range of food. All kinds of food, including bread, rice, cakes, vegetarian and cooked food, melons and fruits, drinks, etc. I especially like delicious, sweet and oily pasta. Cockroaches have the habit of eating oil. Among all kinds of vegetable oils, sesame oil attracts them the most, so some places call them "oil thieves".

Baidu Encyclopedia-Cockroaches (Cockroaches)