Diaphragm predator calls.
Stacked and stretched a bit differently than turkey calls. Top pic calls are 2 reed howlers and other pic is a rabbit distress call, which is my original design from 2011-2012. Its a modified side V cut that blows clean on one side and a bit raspy on the other. 2 sounds in one call.
Bottom pics are a mesquite distress call and a turkey killer.
(https://farm2.staticflickr.com/1861/42476344210_20687502d7_z.jpg) (https://flic.kr/p/27Hunhf)010 (https://flic.kr/p/27Hunhf) by Lonehowl (https://www.flickr.com/photos/31777870@N04/), on Flickr
(https://farm1.staticflickr.com/783/26373025107_25536321d6_z.jpg) (https://flic.kr/p/GbuDxr)007 (https://flic.kr/p/GbuDxr) by Lonehowl (https://www.flickr.com/photos/31777870@N04/), on Flickr
(https://farm1.staticflickr.com/955/42236774172_173b21023f_z.jpg) (https://flic.kr/p/27mjvsm)003 (https://flic.kr/p/27mjvsm) by Lonehowl (https://www.flickr.com/photos/31777870@N04/), on Flickr
Turkey killer..
(https://farm2.staticflickr.com/1738/27565027607_b4fe558f22_z.jpg) (https://flic.kr/p/HZPYmF)005 (https://flic.kr/p/HZPYmF) by Lonehowl (https://www.flickr.com/photos/31777870@N04/), on Flickr