Rob Drummond/ BIA / Brown-throated Wattle-eye (Platysteira cyanea) male, Uganda

Ingo Arndt / Sunrise in the Masai Mara National Reserve, with Whistling Thorn (Acacia drepanolobium) tree in picture, Kenya

Ingo Arndt / Acacia tree at sunrise on savannah, Masai Mara Game Reserve, Kenya

Frederique Olivier / Close-up of an African bush elephant (Loxodonta africana) feeding, stripping vegetation from an Acacia tree with its trunk, Serengeti NP, Tanzania.

Frederique Olivier / African bush elephants (Loxodonta africana) feeding, stripping vegetation from an Acacia tree with its trunk, Serengeti NP, Tanzania.

Charlie Summers / Flat top acacia tree (Acacia abyssinica) damaged by elephants. Elephants get moisture by feeding on the bark.

Jiri Lochman / Plant biodiversity on stabilized coastal dunes with Shark Bay Rose (Diplolaena grandiflora) and Sandhill Wattle (Acacia ligulata) in the foreground, Shark Bay UNESCO Natural World Heritage Site, Weste...

Jiri Lochman / Red winged parrot (Aprosmictus erythropterus) consuming Wattle seeds, Purnululu National Park UNESCO Natural World Heritage Site, Western Australia, Australia.

Luke Massey / Acacia logs being transported, Balikpapan, Indonesia

Luke Massey / Acacia logs being transported, Balikpapan, Indonesia

Luke Massey / Acacia logs being transported, Balikpapan, Indonesia

Ingo Arndt / Whistling thorn tree (Acacia drepanolobium) in open Savanna Grassland under storm clouds, Masai Mara National Reserve, Kenya