We happened to find a nest of Field Farrows tucked away in a spruce tree, we recorded their measurements and weight. They weighed more than the adult Tit and Flycatcher species!
The Coal Tit chicks are almost ready to leave the nest. These birds only need about two weeks before they are old enough to fledge. They all have bands on and are doing great! They are so big compared to the new babies that are hatching. Even though the difference isn't huge the Coal Tits are the smallest of the species we are studying. The chicks started off weight 1-2 grams their first 2 days, and now they weigh between 8-9 grams.