The tyrants sometimes howl when the old newspaper van passes by, answering the mournful call of 'paper lama old newspaper papaeeerrr laaaaamaaaa'. They only howl at certain vans, though, they seem to howl only at those that sound really tragic.
Sometimes they howl with all their might. Sometimes they lift their head and howl a small pathetic whimper. Sometimes they just cock their ears, decide its not worth the effort and continue sleeping. Especially if they're still upstairs enjoying the air-conditioned room.
But when they do decide to put their best effort and perform the howl choir, they sound quite impressive. (Or, if you ask our neighbours, impressively annoying!) Here's an example.
Yesterday I was sitting with the little human tyrant who was happily amusing himself when a paper lama van passed by. The furry tyrants were outside, and decided they would give a performance. All three howled and howled and howled, with strains and arias and what-nots.
The little human tyrant sat listening intently to the choir. Then, to my amusement/ horror/ disbelieve - the little human tyrant pursed his lips into a neat O - and howled a little baby howl! And he has not yet spoken his first word!