Casiornis

{{Short description|Genus of birds}}

{{automatic taxobox

| image = Casiornis rufus -Piraju, Sao Paulo, Brazil-8.jpg

| image_caption = Rufous casiornis (Casiornis rufus)

| taxon = Casiornis

| authority = Des Murs, 1856

| type_species = Casiornis typus{{cite web |url= https://www.aviansystematics.org/4th-edition-checklist?viewfamilies=107 |title= Tyrannidae |author= |date= |website= aviansystematics.org |publisher= The Trust for Avian Systematics |access-date= 2023-07-16}}

| type_species_authority = Des Murs, 1856

}}

Casiornis is a genus of South American birds in the tyrant flycatcher family Tyrannidae.

The genus contains the following two species:{{cite web| editor1-last=Gill | editor1-first=Frank | editor1-link=Frank Gill (ornithologist) | editor2-last=Donsker | editor2-first=David | year=2019 | title=Tyrant flycatchers | work=World Bird List Version 9.2 | url=https://www.worldbirdnames.org/bow/flycatchers/ | publisher=International Ornithologists' Union | accessdate=1 July 2019 }}

class="wikitable"
Image	Common Name	Scientific name	Distribution
120px	Rufous casiornis	Casiornis rufus	Argentina, Bolivia, mid-central Brazil, Paraguay, and northeastern Uruguay
120px	Ash-throated casiornis	Casiornis fuscus	northeastern Brazil.