POISON has killed five of 14 crows admitted to the Currumbin Wildlife Sanctuary Hospital this week.
Senior veterinarian Michael Pyne said the birds were found along Thrower Dr, Palm Beach and post-mortems of the dead birds uncovered suspected poisoning.
He said toxicology reports were still out on the exact substance used though he would not want to publicise it if he did know out of copycat fears.
"There's no doubt it was poison.
"All native wildlife is protected, so crows are protected.
"If you deliberately injure or kill native animals you can be in big trouble."
He said Palm Beach was a common area for crows to inhabit and poisoning incidences occurred about three times a year.
"It's hard to know the motivation for the poisonings - crows can be noisy at night which could be the case.
"They're also easy to feed because they scavenge and are used to people.
"Something that surprises me is the birds were found in the late-afternoon, which suggests the poisoner is doing it during the day.
"It suggests someone should be seeing something suspicious happening."
Mr Pyne said further consequences of this problem could be its impact on other native animals, pets and even small children.
Phone the hospital on 07 5534 0813 or RSPCA Queensland on 1300 264 625 with information.