Guards - different buzz?

[Sutty]

It may be my imagination but it always seems like the guard bees which buzz my head (and sometimes sting) after they have been disturbed sound different to foraging bees that are just flying past. Higher pitched and more varying, the varying can be explained by the changing flight path, but not sure about the pitch/tone.
Anyone else noticed it or is it in my head?

 

[thorn]

It may be my imagination but it always seems like the guard bees which buzz my head (and sometimes sting) after they have been disturbed sound different to foraging bees that are just flying past. Higher pitched and more varying, the varying can be explained by the changing flight path, but not sure about the pitch/tone.
Anyone else noticed it or is it in my head?

Those who are positively aggressive do have a different buzz.

 

[Sutty]

Those who are positively aggressive do have a different buzz.

Not just me then!
Someone will be along shortly to correct you to "defensive"
But I think we know what you mean!

 

[Erichalfbee]

Yes. They sound angry.

 

[The Poot]

Water collecting bees are very similar. Always a higher pitched buzz.