Source: https://commons.wikimedia.org/wiki/FilDescription
Français : Planche N°31 dessinée par Edouard Traviés provenat du livre "Le règne animal distribué d'après son organisation" par Georges Cuvier (Tome 4), seconde édition de 1828, représentant :
-en haut : Martinet noir (Apus apus)
-en bas : Engoulevent d'Europe (Caprimulgus europaeus)
Date 23 April 2013, 14:10:48
Author Rvalette https://commons.wikimedia.org/wiki/User:Rvalette
e:Cuvier-31-Martinet_noir_et_Engoulevent_d%27Europe.jpg

The common swift (Apus apus) is a medium-sized bird, superficially similar to the barn swallow or house martin but somewhat larger, though not stemming from those passerine species, being in the order Apodiformes. The resemblances between the groups are due to convergent evolution, reflecting similar contextual development. The swifts' nearest relatives are thought to be the New World hummingbirds and the Southeast Asian treeswifts.

The European nightjar, Eurasian nightjar or just nightjar (Caprimulgus europaeus) is a crepuscular and nocturnal bird in the nightjar family that breeds across most of Europe and temperate Asia. The Latin generic name refers to the old myth that the nocturnal nightjar suckled goats, causing them to cease to give milk.