Can racing pigeons fly 300 kilometers on cloudy days?

I can't. Pigeons can't fly 300 kilometers on cloudy days, and they can't return to their nests in groups because of training on cloudy days. In order to avoid the loss of racing pigeons, extra flight training is carried out for homing pigeons in bad weather. In case of cloudy, foggy and light rain, homing pigeons should be released on the road at a suitable distance, which varies from day to day. Cloudy day 10-20km or so, within 5km of light rain and fog. Flying in all directions is beneficial for homing pigeons to improve their navigation function.