Add whale sound (CC BY) by Ian Fairley...

https://www.youtube.com/watch?v=VIElj_SLxfc

TODO.txt

@@ -22,7 +22,6 @@ TODO:
 	- fire
 	- train
 	- rain
-	- whale
 	- inflate
 	- pop
 	- gas motor / generator

changelog.txt

@@ -13,6 +13,7 @@ next
 	- seagulls
 	- snake_rattle
 	- squirrel
+	- whale
 - renamed sounds:
 	- sheep -> sheep_baa
 

groups_animal.lua

@@ -251,6 +251,22 @@ sounds.dolphin_click = SoundGroup({
 --  @sndgroup sounds.dolphin
 sounds.dolphin = sounds.dolphin_chirp + sounds.dolphin_click
 
+--- @sndgroup sounds.whale
+--  @snd whale
+sounds.whale = SoundGroup({
+	"whale",
+})
+
+--- <br>
+--
+--  Includes:
+--
+--  - `sounds.dolphin`
+--  - `sounds.whale`
+--
+--  @sndgroup sounds.cetacean
+sounds.cetacean = sounds.dolphin + sounds.whale
+
 
 
 --- Elephant

sources.md

@@ -82,6 +82,7 @@
 | [undead_moan_*][undead_moan]      | AntumDeluge                  | CC0          |                         |
 | [vulture][]                       | AntumDeluge                  | CC0          | imitation               |
 | [watch_tick][]                    | Nicolas4677                  | CC0          |                         |
+| [whale][]                         | Ian Fairley                  | CC BY        |                         |
 | [whistle][]                       | pawsound                     | CC0          |                         |
 | [wolf_howl][]                     | killyourpepe                 | CC0          |                         |
 | [wolf_snarl][]                    | newagesoup                   | CC BY 3.0    |                         |
@@ -232,6 +233,7 @@
 [undead_moan]: https://opengameart.org/node/81246
 [vulture]: https://opengameart.org/node/16329
 [watch_tick]: https://freesound.org/s/446611/
+[whale]: https://www.youtube.com/watch?v=VIElj_SLxfc
 [whistle]: https://freesound.org/s/154873/
 [wolf_howl]: https://freesound.org/s/395192/
 [wolf_snarl]: https://freesound.org/s/338674/