Why Black and Yellow signal danger

This picture is from an earlier walk (29th). I'm not sure I'll be able to upload a picture on the 31st so here is the last yellow day for the rainbow2021.

[Milanie]

Wow - terrific focus!

[Linda Godwin]

outstanding focus on the wasp

[Lin]

Super closeup

[JAKB]

Wonderful detail and color.

[Kim]

Amazing macro!

[Korcsog Károly]

I love this photo!

[Dione Giorgio]

Fav. Fantastic macro capture.

[Mallory]

Wonderful details!

[Granny7(Denise)]

Excellent capture Fav

[Ann H. LeFevre]

Stunning macro!!!

[Jose A.]

Great image!!!