Looks like a Balloon officer who has bailed out of his basket. The troops below looking up are Australians.
Appears to belong to the Dutch National Archives. http://www.flickr.com/photos/29998366@N02/3018265377 Spaarnestad Photo, SFA022802429 Spaarnestad Photo Archive: http://www.spaarnestadphoto.nl/content/view/42/101/lang,en/ The Het Leven Collection: http://www.spaarnestadphoto.nl/component/option,com_memorix/task,topview/searchplugin,simple/Itemid,60/lang,en/mrxpopup,1/CollectionID,1/PhotoID,SFA022802429/RecordID,405156/ResultRecord,0/ Het Leven:
Is this the same bloke ? - http://www.awm.gov.au/collection/H09303/ BATTLE OF MENIN ROAD. ONE OF OUR BALLOON OBSERVERS DESCENDING NEAR ZILLEBEKE, BY MEANS OF HIS PARACHUTE. (BRITISH OFFICIAL PHOTO D2046)