Albert Lleal / Albany Bottlebrush (Callistemon speciosus) SEM close-up view of the pollen covered anther at 70x magnification

WILLIAM OSBORN / Rainbow lorikeet in bottlebrush tree, Queensland, Australia {Trichoglossus haematodus}

Dave Watts / Two Little pygmy possum {Cercarteus lepidus} Australia

Steven David Miller / Rainbow lorikeet (Trichoglossus moluccanus) feeding on Bottlebrush nectar. Lane Cove National Park, Sydney, New South Wales, Australia.

Steven David Miller / Rainbow lorikeet (Trichoglossus moluccanus) feeding on Bottlebrush nectar. Lane Cove National Park, Sydney, New South Wales, Australia.

Heather Angel / Red wattlebird (Anthochaera carunculata) nectaring on Bottlebrush (Callistemon sp). Bird has brush-tipped tongue. Quaalup Homestead near Fitzgerald River National Park, Western Australia.

Ingo Arndt / Squirretail grass (Elymus elymoides), Badlands National Park, South Dakota, USA September.

Ingo Arndt / Paperbark trees or White Bottlebrush (Melaleuca quinquenervia) in the wet season after bushfire with charred bark, Kakadu National Park, Australia, December

Rolf Nussbaumer / Baltimore Oriole (Icterus galbula), adult male feeding on Lemon / Crimson bottlebrush flower (Melaleuca citrina), South Padre Island, Texas, USA. April

Rolf Nussbaumer / Tennessee Warbler (Vermivora peregrina), adult feeding on blooming Lemon bottlebrush, crimson bottlebrush (Melaleuca citrina), South Padre Island, Texas, USA. April

Rolf Nussbaumer / Orchard Oriole (Icterus spurius), male feeding on blooming Lemon bottlebrush, crimson bottlebrush (Melaleuca citrina), South Padre Island, Texas, USA. April

Nick Upton / Crimson / Lemon bottlebrush flower (Malaleuca / Callistemon citrinus), an introduced species from Australia, Kilada, Argolis, Peloponnese, Greece, July 2013.