which resemble a crescent or boomerang. White-chinned swift, Cypseloides cryptus Black swift, Cypseloides niger White-chested swift, Cypseloides lemosi (H) Sooty swift, Cypseloides fumigatus Great dusky swift, Cypseloides senex Tepui swift, Streptoprocne phelpsi White-collared swift, Streptoprocne zonaris Biscutate swift, Streptoprocne biscutata Gray-rumped swift, Chaetura cinereiventris Band-rumped swift, Chaetura spinicaudus Pale-rumped swift, Chaetura egregia Chimney swift, Chaetura pelagica Chapman's swift, Chaetura chapmani Sick's swift, Chaetura meridionalis Short-tailed swift, Chaetura brachyura White-tipped swift, Aeronautes montivagus Fork-tailed palm-swift, Tachornis squamata Lesser swallow-tailed swift, Panyptila cayennensis Hummingbirds Order: ApodiformesFamily: Trochilidae Hummingbirds are small birds capable of hovering in mid-air due to the rapid flapping of their wings. They are the only birds that can fly backwards. Crimson topaz, Topaza pella Fiery topaz, Topaza pyra White-necked jacobin, Florisuga mellivora Black jacobin, Florisuga fusca Saw-billed hermit, Ramphodon naevius (E) (near-threatened) Hook-billed hermit, Glaucis dohrnii (E) (endangered) Rufous-breasted hermit, Glaucis hirsutus Pale-tailed barbthroat, Threnetes leucurus Sooty barbthroat, Threnetes niger Broad-tipped hermit, Anopetia gounellei (E) Dusky-throated hermit, Phaethornis squalidus (E) Streak-throated hermit, Phaethornis rupurumii Tapajos hermit, Phaethornis aethopygus (E) Minute hermit, Phaethornis idaliae (E) Cinnamon-throated hermit, Phaethornis nattereri Gray-chinned hermit, Phaethornis griseogularis Reddish hermit, Phaethornis ruber Buff-bellied hermit, Phaethornis subochraceus Sooty-capped hermit, Phaethornis augusti Planalto hermit, Phaethornis pretrei Scale-throated hermit, Phaethornis eurynome White-bearded hermit, Phaethornis hispidus Needle-billed hermit, Phaethornis philippii Straight-billed hermit, Phaethornis bourcieri Long-tailed hermit, Phaethornis superciliosus Great-billed hermit, Phaethornis malaris Blue-fronted lancebill, Doryfera johannae Hyacinth visorbearer, Augastes scutatus (E) (near-threatened) Hooded visorbearer, Augastes lumachella (E) (near-threatened) Brown violetear, Colibri delphinae Sparkling violetear, Colibri coruscans White-vented violetear, Colibri serrirostris Horned sungem, Heliactin bilophus Black-eared fairy, Heliothryx auritus White-tailed goldenthroat, Polytmus guainumbi Green-tailed goldenthroat, Polytmus theresiae Fiery-tailed awlbill, Avocettula recurvirostris Ruby-topaz hummingbird, Chrysolampis mosquitus Green-throated mango, Anthracothorax viridigula Black-throated mango, Anthracothorax nigricollis Black-bellied thorntail, Discosura langsdorffi Racket-tailed thorntail, Discosura longicaudus Tufted coquette, Lophornis ornatus Dot-eared coquette, Lophornis gouldii Frilled coquette, Lophornis magnificus (E) Spangled coquette, Lophornis stictolophus Butterfly coquette, Lophornis verreauxii Festive coquette, Lophornis chalybeus Peacock coquette, Lophornis pavoninus Velvet-browed brilliant, Heliodoxa xanthogonys Black-throated brilliant, Heliodoxa schreibersii Gould's jewelfront, Heliodoxa aurescens Brazilian ruby, Heliodoxa rubricauda (E) Long-billed starthroat, Heliomaster longirostris Stripe-breasted starthroat, Heliomaster squamosus (E) Blue-tufted starthroat, Heliomaster furcifer Amethyst woodstar, Calliphlox amethystina Blue-tailed emerald, Chlorostilbon mellisugus Glittering-bellied emerald, Chlorostilbon lucidus Blue-chinned sapphire, Chlorestes notata Green-crowned plovercrest, Stephanoxis lalandi (E) Purple-crowned plovercrest, Stephanoxis loddigesii Gray-breasted sabrewing, Campylopterus largipennis Outcrop sabrewing, Campylopterus calcirupicola (E) Diamantina sabrewing, Campylopterus diamantinensis (E) Rufous-breasted sabrewing, Campylopterus hyperythrus Buff-breasted sabrewing, Campylopterus duidae Fork-tailed woodnymph, Thalurania