3 ms·
This assumes a 20g swallow. "European swallow" typically refers to the barn swallow, which ranges between 16 to 22g. So between 68,000 and 94,000 unladen swallo
by SAI_Peregrinus 12y ago
This assumes a 20g swallow. "European swallow" typically refers to the barn swallow, which ranges between 16 to 22g. So between 68,000 and 94,000 unladen swallows.