Collocations for specimen - noun

large, small
beautiful, fine, good, healthy, magnificent, perfect, prize (esp. BrE)
This is a fine specimen of a walnut tree.

living, preserved
well-preserved specimens of Homo erectus

complete, incomplete
adult, juvenile
female, male
rare
physical

find
He found two specimens of early humans.

plant, tree

blood, urine, etc.

collect, take
give, provide
The motorist may be required to give a urine specimen.

obtain