Four hornbill species - Great Hornbill, Oriental Pied Hornbill, Wreathed Hornbill, Tickell's Brown Hornbill. I gave this hornbill multi-species postcard to the staff of the resort hotel that I was staying near Khao Yai National Park to mail on August 15, 2016. Noticed that it was cancelled only on April 4, 2017 - may be the staff forget. It arrived in mailbox in Penang island on April 13, 2017 - which almost 8 months that I have written the postcard. It got Pak Chong post office cancellation, the gateway town with a train station outside of the national park. At least the postcard finally arrived.