The homemade birds trap you see here is made of a curved iron rod, a piece of rubber and two wooden sticks. Some time ago this type of traps were very common, but now people almost stopped using these traps, however still some people particularly kids use them. Personally, I will never recommend this trap for catching birds, because it can harm the birds and even can kill them, if not removed immediately. The pictures below are taken by my 10 years old nephew.
Homemade Bird Trap