Navaornis

Hiika maqaa: “Nava's bird, honoring William Nava who discovered the fossil site”1

Kan nyaate: FoonSimbirroota jalqabaaKireetaashasii Dhumaa

Navaornis was a starling-sized bird that lived about 80 million years ago in what is now Brazil. It had a toothless, large-eyed skull that looked almost like a modern bird, but it belonged to an ancient group called enantiornithines. Its beautifully preserved skull let scientists see inside its brain for the first time in such an old bird.1 2

Kan jiraate

waggaa miliyoona 84 hanga 66 dura3

Kireetaashasii Dhumaa

Fosiliiwwan kan itti argaman

William's Quarry at Sítio Paleontológico 'José Martin Suárez', Presidente Prudente, São Paulo State, Brazil1 3

Saffisa ol'aanaa

gara 27 km/sa'a (17 mph)

Balali'uu, tilmaama

Yoom jiraate?

Tiraayaasikii

Juraasikii

Kireetaashasii

waggaa miliyoona 252 dura20114566, asteerooyidii

Hammam saffisaa ture?

Nama miilaan deemu gara 5 km/sa'a (3 mph)

Daa'ima saayikilii irra jiru gara 12 km/sa'a (7 mph)

Navaornis gara 27 km/sa'a (17 mph)

Farda gulufu gara 65 km/sa'a (40 mph)

Cheetaa gara 100 km/sa'a (62 mph)

wantoota bareedoo

Odeeffannoowwan bashannansiisoo

Navaornis had a toothless skull with large eyes, just like many birds today, but its brain still had some ancient features like a small cerebellum and a weakly expanded telencephalon.1

Its skull is the best-preserved Mesozoic bird skull ever found, preserved in three dimensions without being flattened.1

Navaornis lived around 85 to 75 million years ago, during the Late Cretaceous period.1 2

The fossil site where Navaornis was found is very small, only about 6 square meters, but it has yielded hundreds of enantiornithine bird bones.1

Navaornis belongs to a group called Enantiornithes, which were the most diverse birds of the Mesozoic and lived on every continent except Antarctica.1 2

Its inner ear (bony labyrinth) was shaped like that of many modern birds but was much larger.1

Fakkii AI'n hojjetame: Navaornis — Fakkii AI'n hojjetame kan Navaornis maal fakkaachuu akka danda'u agarsiisu, kompiitaraan beekumsa saayintistootaa irratti hundaa'uun hojjetame. Tilmaama qofa: bineensi dhugaa adda ta'ee mul'achuu danda'a, halluu isaa dhugaa immoo namni beeku hin jiru.

Ogeeyyii daayinootiif

Maqaa saayinsii: Navaornis
Kan maqaa baase: Chiappe et al. 20243
Garee: Simbirroota jalqabaa
Maatii / kilaadii: Enantiornithes3
Ramaddii: Theropoda > Avialae3
Umurii dhagaawwanii: waggaa miliyoona 84 hanga 66 (Campanian / Maastrichtian)3
Caasaawwan dhagaa: Adamantina3
Biyyoota: Biraazil3
Galmee fosilii: 1 The Paleobiology Database keessa3
Argannoo: The fossil site was discovered in 2004 by William Nava, and the holotype skull was found in 2016. The species was named Navaornis hestiae by Chiappe and colleagues in 2024.1 3
Ammallee falmisiisaa: Scientists are still debating exactly how Navaornis is related to other enantiornithines, because its toothless skull and modern-looking head make it hard to place in the family tree.1

Odeeffannoon eessaa dhufa

Cretaceous bird from Brazil informs the evolution of the avian skull and brain | Nature (nature.com)
Cretaceous bird from Brazil informs the evolution of the avian skull and brain (pmc.ncbi.nlm.nih.gov)
Navaornis in The Paleobiology Database (CC BY 4.0): umurii, bakkeewwan, caasaawwan dhagaa, ramaddii.

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