Hybridise

Cattle and European bison hybridise fairly readily, but the calves cannot be born naturally (birth is not triggered correctly by the first-cross hybrid calf, and they must therefore be delivered by Caesarian section ).

Persian limes in a grocery store Citrus trees hybridise very readily – depending on the pollen source, plants grown from a Persian lime 's seeds can produce fruit similar to grapefruit.

Where the black and blue wildebeest share a common range, the two can hybridise, and this is regarded as a potential threat to the black wildebeest.