What the cat brought in!!

My son s cat brought this tiny Bird in to his house this morning and he brought it up for me to sort! I made sure it was warm , then I tried feeding it on earl worm , it are some. Then I fought some flies which it ate and I bought insect fat mix .. it ate that too. I fact it’s eaten all day. But I can’t keep the 20 min s feeds up so sent it back home with my son for him to sort and hopefully find someone who can bring it on. We think it’s a Blackbird.