Police and environment officers are searching for the crocodile believed to have taken missing elderly woman Anne Cameron from a Port Douglas creek.

A Department of Environment and Heritage Protection spokesman said traps will be set in an attempt to catch the crocodile as they continue to look for the woman's body.

On Facebook, Anne's granddaughter, Isabella Eggins thanked those who helped in the extensive search for her grandmother.

"Unfortunately it did not end on good terms but she will be missed and will always be loved by her family," wrote Isabella.

Forensic testing is being conducted on "biological matter" found near clothing and a walking stick after Ms Cameron, a dementia sufferer, went missing from a far north Queensland nursing home.

Ms Cameron, 79, was last seen near the OzCare Aged Care facility at Craiglie, Port Douglas, on Tuesday afternoon.

Police fear Ms Cameron, who only been at the facility for a few weeks, may have been taken by a crocodile after becoming disoriented when she wandered into a dense area of bushland.

Clothes and a walking stick with Ms Cameron's name on it were discovered on Thursday at the end of Four Mile Beach.

"We have also located some biological matter which we believe to be human remains and these are being tested in Cairns," Acting Inspector Ed Lukin said on Thursday.

"We continue to search the area in the hope of finding her alive (but) because of the proximity of these items near the creek bank, we cannot rule out the possibility of a crocodile attack.

"Family have been notified and have asked for their privacy."

The results of the forensic tests are likely to be ready on Friday.