“…However, their aerial lifestyle, the difficulty of access to their nests, and in some cases their natural rarity, makes them difficult to study. Despite several recent contributions, knowledge on the life history of this group remains poor (Collins 1980, Marín and Stiles 1992, Pichorim 2002, Pearman et al 2010, Biancalana 2015, Areta et al 2020). Here, we report on the breeding biology of 3 swift species, the Spot-fronted ( Cypseloides cherriei ), Chestnut-collared ( Streptoprocne rutila ), and White-collared ( S. zonaris ) swifts that co-occur in Parque Nacional (PN) Yacambú, Venezuela.…”