Add crow_caw sound (CC BY 4.0) by Morris Gevirtz...

https://www.xeno-canto.org/617630

README.md

@@ -32,6 +32,7 @@ As of right now, only sounds from *default* mod have been added.
 | [clock_tick][]                    | AntumDeluge              | CC0          |                         |
 | [coin][]                          | greenvwbeetle            | CC0          |                         |
 | [cow_moo*][cow_moo]               | JosephSardin             | CC0          |                         |
+| [crow_caw][]                      | Morris Gevirtz           | CC BY 4.0    |                         |
 | [dog_bark][]                      | ivolipa                  | CC0          |                         |
 | [duck_quack][]                    | Jonathon Jongsma         | CC BY-SA 3.0 |                         |
 | [elephant][]                      | vataaa                   | CC0          |                         |
@@ -161,6 +162,7 @@ sounds.horse_neigh(2, {gain=1.0})
 [clock_tick]: https://opengameart.org/node/16323
 [coin]: https://freesound.org/s/423332/
 [cow_moo]: https://freesound.org/s/177253/
+[crow_caw]: https://www.xeno-canto.org/617630
 [dig_choppy]: https://freesound.org/s/476113/
 [dig_cracky]: https://freesound.org/s/71823/
 [dig_gravel]: https://freesound.org/s/179341/

TODO.txt

@@ -53,7 +53,6 @@ TODO:
 	- swan / goose
 	- snake hiss
 	- snake rattle
-	- crow
 	- pigeon
 	- peacock
 	- hyena

changelog.txt

@@ -11,6 +11,7 @@ next
 	- bumble_bee
 	- chicken
 	- clock_tick
+	- crow_caw
 	- duck_quack
 	- grasshopper
 	- jaguar_saw

groups.lua

@@ -90,6 +90,14 @@ sounds.cow_moo = SoundGroup({
 	"cow_moo_02",
 })
 
+--- Crow caw sounds.
+--
+--  @sndgroup sounds.crow_caw
+--  @snd crow_caw
+sounds.crow_caw = SoundGroup({
+	"crow_caw",
+})
+
 --- Dog bark sounds.
 --
 --  @sndgroup sounds.dog_bark