Bird that goes unnoticed, always flying at great heights. It measures between 11 and 14 centimeters and its color is all grayish-brown, with especially long wings, which help it in flight. His paws are tiny and he spends all day flying very high, hunting for insects. It is a migratory species, disappearing from the city of Rio de Janeiro during the winter. It can be seen flying over the Campus of Praia Vermelha in small flocks.