Presentation on theme: "Hybrids in Nature. Feathers The northern pintail and the mallard are two of North Americas most abundant ducks. When a male from either species mates."— Presentation transcript:
Feathers The northern pintail and the mallard are two of North Americas most abundant ducks. When a male from either species mates with a female of the other, the resulting hybrid combines the elegance and sophisticated markings of the pintail with the familiar sturdiness of the mallard. Male northern pintail Male mallardHybrid
Feathers On the Great Plains of North America, the Bullocks and Baltimore orioles interbreed freely, forming an extensive hybrid zone. Male Bullocks orioleMale Baltimore orioleHybrid
Petals Iris brevicaulis and Iris fulva have different primary pollinators– bumblebees and hummingbirds, respectively– which helps limit interbreeding in the wild. Crossbreeding in the lab or for horticultural purposes, however, produces a rich variety of blossoms. Iris fulvaHybridsIris brevicaulis
Petals Helianthus annuusHelianthus petiolarisHelianthus anomalus Hybridization in nature between two wild sunflowers led to the natural evolution of a third species. Differences among species are evident in green bracts on the flowers undersides.
Slime Yellow bellied toadEuropean firebellied toad These hybridize over a 3,000 mile-long, 6-mile-wide area in central Europe. The offspring of these matings are often deformed; many die as embryos.
Natural History November, 2002 About 10% of all wild plant species may have evolved via hybridization Paradoxically, hybrids are often very hard to find in the heart of a hybrid zone. Resistant to being pigeonholed, hybrids have long taxed the purists.