Ultrasonic devices are bird deterrents that emit static sounds that, in theory, will disturb the birds to keep them away from closed or semi-enclosed areas. Ultrasonic scarecrows are not harmful to birds, however there is a debate surrounding the ability ...

Do hedgehogs need light at night? Because they are nocturnal, hedgehogs do best with a constant light source for about 12 to 14 hours a day. … This is important because natural light is not always constant, and light is ...