Vencejo del Himalaya vs Vencejo Palmero Asiático

Blyth's Swift and Asian Palm Swift can be distinguished by their tail shapes and flight patterns. Blyth's Swift has a more robust build and a slightly forked tail, while the Asian Palm Swift is more slender with a deeply forked tail.

Look for the tail shape: Blyth's Swift has a slightly forked tail, while the Asian Palm Swift has a deeply forked tail. Observe the flight pattern: Blyth's Swift exhibits more powerful wingbeats, whereas the Asian Palm Swift has a fluttery flight.

Blyth's Swift is generally more robust compared to the slender Asian Palm Swift.

Blyth's Swift often flies higher and with more powerful wingbeats compared to the more fluttery flight of the Asian Palm Swift.