https://en.wikipedia.org/wiki/Budgerigar

I don't quite understand, MI6...

the parakeet image....and the budgerigar image....pat Andrew had once 'got angry' about not being able to tell the difference between her 'birds-on-a-list' in 1980 and at fort Monckton.....

 

"Head detail of a male budgerigar"...not a 'parakeet' then?...go figure.