This is one of the most wide-spread swift species in South America, being found at lower elevations throughout the entire Amazon Basin. I got my first good looks at them on my second trip to Brazil which focused on the Northeast of that amazing country. It apparently does not overlap in range with the other two species in this genus (Tachornis), the Antillean Palm-Swift or the Pygmy Swift. I don't know if this is accurate, but the Wiki page says they construct their hanging nests by stealing feathers off other birds and pasting them with saliva. This is called Kleptoptily. This species of Palm Swift has been seen aggressively dive-bombing Parrots, Pigeons and Woodpeckers and literally plucking feathers directly off their backs while in flight.
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