Generally, not only street dogs but also pet dogs are known to bark and howl at night. There are many reasons for this. It is said that a dog barking is a bad omen and that it indicates an impending death. But a recent study has revealed the reason why dogs bark at night.
Street dogs bark as a way of signalling other dogs in their pack. Sometimes, if they have traveled far away, they bark continuously to find a safe place. Apart from that, it is also said that they bark as a way of communicating with the surrounding dogs.