is there any hybrids available of the last one?
Yes, "E. chrysantha",  "E. rivalis" and  "E. erythrandra".
Eucalyptus
Hybrid individuals have not always been recognised as such on first collection and some have been named as new species, such as "E. chrysantha" ("E. preissiana" × "E. sepulcralis") and "E." "rivalis" ("E. marginata" × "E. megacarpa"). Hybrid combinations are not particularly common in the field, but some other published species frequently seen in Australia have been suggested to be hybrid combinations. For example, "E. erythrandra" is believed to be "E. angulosa" × "E. teraptera" and due to its wide distribution is often referred to in texts.
where do you find australian green tree frog? Australia and New Guinea does it has any scientific name? Yes, "Ranoidea caerulea". is it under any threat or needs to be conserved? Yes, it is a threat in suburban areas by pollution and by predation by domestic animals. in which research is it used? UNANSWERABLE where is the above mentioned latter place situated? It is located in Melanesia in the southwestern Pacific Ocean. what other kind of wild life or plant life does it support? The flora includes  "Podocarpus", "Araucaria" and "Agathis," and several species of "Eucalyptus".
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Eucalyptus [SEP] Species and hybrids
Hybrid individuals have not always been recognised as such on first collection and some have been named as new species, such as "E. chrysantha" ("E. preissiana" × "E. sepulcralis") and "E." "rivalis" ("E. marginata" × "E. megacarpa"). Hybrid combinations are not particularly common in the field, but some other published species frequently seen in Australia have been suggested to be hybrid combinations. For example, "E. erythrandra" is believed to be "E. angulosa" × "E. teraptera" and due to its wide distribution is often referred to in texts. Renantherin, a phenolic compound present in the leaves of some eucalyptus species, allows chemotaxonomic discrimination in the sections renantheroideae and renantherae and the ratio of the amount of leucoanthocyanins varies considerably in certain species.