What a detail. What a nice series, and even a lot more in your added link.
I see you used 7D mkII and 600II lens for these photos. Still struggling with my 7D mkII to get that quality. No problem to get it with the 1Dx. So yesterday evening I was reading again your ebook "The guide to tropical nature photography again" for being fully prepared for my trip to Costa Rica in September.
Nice job, congrats Glenn.
Camera: 2x 1Dx mk2, 5D mk3, 7D mk2, 300D | Prime:14 2.8Lii, 24 1.4Lii, 50 1.4, 85 1.2Lii, 100 2.8Lmacro, 300 2.8Lii, 600 4.0Lii | Zoom: 16-35 4.0L, 24-70 2.8Lii, 24-105 4.0L, 70-200 2.8Lii, 100-400 4.5-5.6 Lii, 200-400 1.4x 4.0L | TS-E 24 3.5Lii | Other: 1.4xIII, 2.0xIII, YN600EX-RT, YN560iii,Lee