John Cancalosi / Black rat {Rattus rattus} feeding on cactus blossoms, introduced pest, Antigua, W Ind.

Nigel Cattlin / Flower opening series of images of an Apple from pink bud to king flower among a rosette of green leaves in spring Berkshire, England, UK.

Nigel Cattlin / Leaf and flower bud an apple twig swelling and starting to open in early spring Berkshire, England, UK.

Nigel Cattlin / Young Crab apple tree (Malus 'John Downie') in full blossom on a fine spring day, Berkshire, England, UK. May

Matthias Breiter / Hoverfly (Syrphidae) on Cow Parsnip (Heracleum maximum) blossoms, Haida Gwaii, Canada

Christian Ziegler / Orchid (Lepanthes sp.) blossoms are less than a half inch long, Finca Darcula Orchid Sanctuary, Panama

Marie Read / Northern parula (Parula americana) male singing from flowering crabapple (Malus sp.) tree in spring, near Salamanca, New York, USA, May 2022,

Bruce Thomson / Purple-crowned lorikeet (Glossopsitta porphyrocephala) feeding in Eucalypt blossoms, Port Augusta, South Australia.

Christophe Courteau / Studio timelapse of Cherry tree (Prunus sp.) blossom opening, France.

Christophe Courteau / Studio timelapse of Cherry tree (Prunus sp.) blossom opening, France.

John Cancalosi / Gilded flicker (Colaptes chrysoides) flying to feed on nectar from Saguaro blossoms (Carnegiea gigantea), Sonoran desert, Arizona.

John Cancalosi / Gila woodpeckers (Melanerpes uropygialis) feeding on nectar and insects from Saguaro blossom (Carnegiea gigantea) while fighting over access to blossoms, Sonoran desert, Arizona.

John Cancalosi / Gila woodpecker (Melanerpes uropygialis) pair feeding on Saguaro cactus (Carnegiea gigantea) blossom nectar, one chasing the other off the blossoms, Sonoran Desert, Arizona, USA.

Fabian Muhlberger / Wild Wonders of China / Taiwan Yuhina ( Yuhina brunneiceps ) feeding on blossoms, Alishan National Recreation Forest area, Taiwan. Endemic.

Doug Perrine / I'iwi / Scarlet honeycreeper (Vestiaria / Drepanis coccinea) feeding on blossoms of mamane tree, (Sophora chrysophylla) also an endemic species, Haleakala National Park, Maui, Hawaii. Endemic, Vul...

Konrad Wothe / Tree sparrows (Passer montanus) Bavaria, Germany, April.