The tree in silhouette is an Australian native, Casuarina equisetifolia or Australian pine tree. It is a she-oak species of the genus Casuarina of the family Casuarinaceae. The native range extends from Burma and Vietnam throughout Malesia east to French Polynesia, New Caledonia, and Vanuatu, and south to Australia (north of Northern Territory, north and east Queensland, and north-eastern New South Wales). The species has been introduced to the Southern United States and West Africa. It is an invasive species in Florida and South Africa.
This post is part of the Skywatch Friday meme,
and also part of the Saturday Silhouettes meme.