thigmotactic

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Red desert bloom on a Cholla Cactus Royalty Free Stock Photo

Crawling out from between food products a wild gray house mouse, Mus musculus, in a kitchen. Royalty Free Stock Photo

A wild brown house mouse sitting on a pile of Christmas decorations. Royalty Free Stock Photo

Side view of a brown house mouse with a curly tail in a tea cup. The dishes in the background are blue and white. Royalty Free Stock Photo

A brown house mouse, Mus musculus, trapped in the corner. Royalty Free Stock Photo

Top close up view of a brown house mouse in the bottom of a white China cup. Royalty Free Stock Photo

Back view of a brown house mouse in the bottom of a white China cup. Royalty Free Stock Photo

Prickly Pear Cactus on Floreana Island, Galapagos Islands

Side view of a brown house mouse straddling two wires in an electrical outlet. Royalty Free Stock Photo

Full body side view of a wild gray house mouse in a kitchen cabinet with jars of food behind him. Royalty Free Stock Photo

Side view of a wild brown house mouse on a pine cone. Royalty Free Stock Photo

Side view of a brown house mouse running down a wire on an electrical outlet. Royalty Free Stock Photo

Frontal view of a wild brown house mouse with his paws push up against the inside of a long stemmed wine glass. Royalty Free Stock Photo

Side view of a moving brown house mouse with a curly tail in a tea cup. The dishes in the background are blue and white. Royalty Free Stock Photo

A brown house mouse, Mus musculus, sitting on a window. Royalty Free Stock Photo

Charles Darwin was the first to note that these cacti have thigmotactic anthers: when the anthers are touched, they curl over, depositing their pollen.