The perfect match

exclusive specific

benefit advantage

species a class of plants or animals

choosy fussy, difficult to please

broad general, widespread

superior better

offspring young animals, children

rare uncommon

mammal an animal that has hair or fur and gives birth to babies

maintain keep up

trait special quality or characteristic of a person

preference here thing that is preferred

communal shared by a group

enclosure area surrounded by a fence

previously before

confound here, scientific term factor that affects the results of an experiment or study

objectively factually, not influenced by personal feelings or opinions

inferior here less good

eventually finally

aviary large cage in which birds are keept

compatibility state in which two things work well together

behaviourally in terms of behaviour

embryo unborn animal or human

viability biology ability to live or survive successfully

hatching when a bird comes out of its egg

vary change, differ

nevertheless however, nonetheless, still

evolve develop

improve make better

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