Hybrid (biology) are the mule, a cross between a female horse and a male donkey, and the hinny, a cross between a female donkey and a male horse. Pairs of complementary types like the mule and hinny are called reciprocal hybrids. Among many other mammal crosses are hybrid camels, crosses between a bactrian camel and a dromedary. The first known instance of hybrid speciation in marine mammals was discovered in 2014. The clymene dolphin ("Stenella clymene") is a hybrid of two Atlantic species, the spinner and striped dolphins. Cagebird breeders sometimes breed bird hybrids known as mules between species of finch, such
Travels with a Donkey in the Cévennes us the landscape that makes us who we are." Several writers, such as the Scottish novelist Christopher Rush, have written of their own efforts to retrace Stevenson's steps. Accounts include a bicycle trip 25 years after Stevenson's hike and a comic adventure on the part of two British women. A section of Richard Holmes' "Footsteps: Adventures of a Romantic Biographer" chronicles the author's retracing of Stevenson's journey as well. Travels with a Donkey in the Cévennes Travels with a Donkey in the Cévennes (1879) is one of Robert Louis Stevenson's earliest published works and is considered a pioneering classic of