Common Swift vs Bradfield's Swift

The Common Swift and Bradfield's Swift are both dark, fast-flying birds with long, pointed wings and forked tails. The most reliable difference is the Common Swift's small off-white throat patch, which is absent in Bradfield's Swift. Both species have similar silhouettes and flight patterns, making plumage details crucial for identification.

Look for the off-white throat patch on the Common Swift, especially when seen from below. In the absence of this feature, consider the bird to be Bradfield's Swift. Pay attention to lighting and angle, as these can affect the visibility of plumage details.

Both species are similar in size, with the Common Swift having a wingspan of 42–48 cm.

The Common Swift has a small off-white throat patch, which is a key distinguishing feature. Bradfield's Swift lacks this throat patch, appearing uniformly dark.