4K HD Wallpaper: Bee collecting Pollen for Honey
Absolutely outstanding macro photography. If you look for images related to bees for use in desktop backgrounds, homescreen phones, web design projects, blog articles about bees, social media... check this one, because it's free under CC0 license and very beautiful.
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)