The postal service delivered a notice Tuesday to about 30 residents of Ralph Avenue in Winnipeg, Manitoba, explaining mail delivery has been suspended due to crows dive-bombing the neighborhood's letter carrier, the Canadian Broadcasting Corp. reported Friday.
"Due to the ongoing safety concern caused by the aggressive crows attacking your letter carrier, all mail delivery is temporarily suspended until Canada Post and the city of Winnipeg can determine a solution," the notice read.
Canada Post said the residents can pick up their mail from the depot.
Resident Len Chapko said the birds in question are nesting in a tree in front of his house and have been attacking him when he goes outside.
"He come so close, he raised the hair on the back of my head. So I looked up and the neighbours are laughing because he came after me!" Chapko said.
Manitoba Conservation said the birds may have become aggressive to protect their young, which are likely hear the point when they leave the nest and learn how to fly. The agency said the period can last anywhere from a day to about a week, or longer if the young birds are injured.