Credits:

Spring pictures (from top left to bottom right)

Nasa Equinox, flickr

Amazing spring! Wikimedia

Fresh water from natural spring, Wikimedia

Sakura Tree Blossom, Turkey, Ankara, Dikmen Vadisi, spring 2015

Blackbird nest with three eggs, Wikimedia

Boxing Hares, Wikimedia, Hasenhampf

MaxPixel.net Sunshine curtain blown wind summer window cottage

MaxPixel.net Arugula Plants Plant Seedlings Leaflet Young

Bear, Naknaknak, Pixabay

Blue Mountains Library Ephemera Spring Cleaning, flickr

Female Mallard with ducklings, Wikimedia

Windy by Garry Knight, flickr

Abstract images (from top left to bottom right)

Point of light – pixnio

Rain on spider web –

Painted blocks – pxhere

Rain on car bonnet – piqsels.com

Green ink - negativespace.co

Sliced sphere – piqsels.com

Branches – pix nio

Colour explosion – negativespace.co

Red barrel – flickr

Green waves – pxhere

Confetti – piqsels.com

Reflection - flickr