A sea urchin.

aragonite

The reciprocating bar to which the needle of a sewing machine is attached.

A park where sterilized needles are made available to recreational drug users.

Pezoporus occidentalis, a small parrot endemic to Australia.

(mathematics) A number consisting of a whole number and a fraction, such as 11½.

Yucca filamentosa (spoonleaf yucca, filament yucca, silkgrass) / Yucca flaccida (weak-leaf yucca, beargrass) / Yucca gloriosa (Spanish dagger)

Any noctuid moth (Noctuidae).

douroucouli (Aotus spp.)

The note naturally used by a male bird to call a female. It is artificially applied by birdcatchers as a decoy.