The lawyer for a Perth man accused of ripping the head off Kevin the Kookaburra by the RSPCA and tavern patrons called the bird a "dangerous nuisance animal" and said the pub should have dealt with before it was killed.

Lawyer Ross Williamson, who acts for Daniel Welfare, told Nine News Perth he had left the country following a barrage of death threats over last week's incident.

RSPCA WA said the man was at the Parkerville Tavern when he grabbed local favourite Kevin the Kookaburra and pulled his head off, then threw the bird under the table.

Mr Williamson said Mr Welfare's female companion had also gone to be with friends following a number of death threats, and two restraining orders had been issued to women who had been involved in an online vigilante campaign.