This is about traffic of class 770/771 (former T669.0/T669.1), which is called "bumblebees", in Ostrava region. In this region now operates 770/771 of several companies: state company České dráhy (Czech railways), iron works Nová hu and private companies OKD Doprava and Slezskomoravská draha. This article pay attention also some interesting locomotives, e.g. the prototype of class T669.2, because this locomotive - now marked as 771.701 - is owned by OKD Doprava. There is also a mention about traffic of remote control Theimeg on locomotives in steelworks Nová hu.