Alex Hyde / Stinging nettle (Urtica dioica) close up of stinging hairs, the silicified tips of the stinging hairs are brittle and snap off easily if the nettle is brushed. Focus stacked image. UK.

Doug Perrine / Flower Hat Jelly / Jellyfish (Olindias formosa), a rare hydromedusa with fluorescent tentacle tips. Endemic to Brazil, Argentina, and southern Japan.

Andy Sands / Red grouse (Lagopus lagopus scoticus) feeding on Heather tips in blizzard, Cairngorms, Scotland, UK

Pete Oxford / Kathiawari horse with alert inward-turned ears which meet at the tips. Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

Michael & Patricia Fogden / Blue Poison Dart Frog (Dendrobates azureus) very tiny frog used by Indian tribes to poison tips of arrows, native to South America

Gerry Ellis / Blue Poison Dart Frog (Dendrobates azureus) secretes a fluid from its skin which is used by indigenous Indians to poison the tips of arrows, native to South America

Georgette Douwma / Common reef / Day octopus hunting for crustaceans and fish, enclosing coral head with arms and webs, using the arm tips to flush out prey into waiting suckers {Octopus cyaneus} Andaman Sea, Thailand

Chris Mattison / Window Plant (Fenestraria rhopalophylla) with leaf-tips emerging through sand. Port Nolloth, South Africa, October.

Chris Mattison / Window Plant (Fenestraria rhopalophylla) with leaf-tips emerging through sand. Port Nolloth, South Africa, October.

Jabruson / Termite (Macrotermes) nest structure located on tree trunk, mud drainage tips built into the sides of the structure to assist with water run-off during tropical downpours. Bai Hokou, Dzanga-Ndoki Nati...

Marie Read / Cedar Waxwing (Bombycilla cedrorum) first-year adult with no waxy tips to wings, feeding on Serviceberry (Amelanchier sp.) fruit in early summer, New York, USA, June

Nick Upton / Epiphytic red alga (Ceramium sp.) tufts growing on tips of Thongweed (Himanthalia elongata) fronds just below extreme low water on a spring tide, alongside clumps of Toothed wrack (Fucus serratus) nea...

Paul Williams / Jabiru stork (Jabiru mycteria) in flight, Pantanal, Pocone, Brazil, digital composite to add tips to right wing

Nick Upton / Colourful mix of Bushy rainbow wrack (Cystoseira tamariscifolia) with turquoise iridescent tips to its fronds and red Harpoon weed (Asparagopsis armata) surrounded by Coralweed (Corallina officinalis)...

Nick Upton / Colourful mix of Bushy rainbow wrack (Cystoseira tamariscifolia) with blue iridescent tips to its fronds and red Harpoon weed (Asparagopsis armata) surrounded by Coralweed (Corallina officinalis) Furb...

Nick Upton / Bushy rainbow wrack (Cystoseira tamariscifolia) with blue iridescent tips to its fronds alongside red Harpoon weed (Asparagopsis armata) an invasive species, in a rockpool very low on the shore, near...

Nick Upton / Epiphytic red alga (Ceramium sp.) tufts growing on tips of Thongweed (Himanthalia elongata) fronds just below extreme low water on a spring tide, near Falmouth, Cornwall, UK.

Terry Whittaker / 2020VISION / Flock of Waxwings (Bombycilla garrulus) flying over a hedge with Cotoneaster (Cotoneaster integerrimus) berries, Whitstable, Kent, England, UK, January. Did you know? Waxwings are so called for the re...

Merryn Thomas / Boxes of recyling stacked at a tip on St. Martin's, Isles of Scilly, UK, October 2011.

Doug Perrine / Flower Hat Jelly / Jellyfish (Olindias formosa), a rare hydromedusa with fluorescent tentacle tips. Endemic to Brazil, Argentina, and southern Japan.

Ross Hoddinott / 2020VISION / Orange Tip butterfly {Anthocharis cardamines} male resting on Cuckooflower {Cardamine pratensis}, green background, north Devon, UK. April. Did you know? Only male orange tip butterflies have orange w...

Doug Perrine / Flower hat jelly / jellyfish (Olindias formosa) captive, a rare hydromedusa with fluorescent tentacle tips, found off Brazil, Argentina, and southern Japan

Doug Perrine / Flower hat jelly / jellyfish (Olindias formosa) captive, a rare hydromedusa with fluorescent tentacle tips, found off Brazil, Argentina, and southern Japan

Pete Oxford / Huaorani Indian making Curare tipped darts. Curare is one of the most toxic poisons known to man and is made from a liana. The poison is boiled on the fire. The dart tips are dipped into the poison wh...

Pete Oxford / Huaorani Indian making Curare tipped darts. Curare is one of the most toxic poisons known to man and is made from a liana. The poison is boiled on the fire. The dart tips are dipped into the poison wh...

Juergen Freund / Researcher Guido Westhoff catching a Spotted python (Antaresia maculosa) in a trash dump site. Dump sites and rubbish tips are favorite hiding places of reptiles. Snakes often take cover under sheets...

Juergen Freund / Researcher Guido Westhoff finding a Spotted python (Antaresia maculosa) in a trash dump site. Dump sites and rubbish tips are favorite hiding places of reptiles. Snakes often take cover under sheets o...

Martha Holmes / Staghorn coral {Acropora cervicornis} with open polyps feeding at night, Grenadines, Caribbean. White tips typical of healthy growing staghorn coral.

Andy Rouse / European brown hare (Lepus europaeus) rear view of ears showing markings and black tips, Wiltshire, UK

Andy Sands / Essex Skipper (Thymelicus lineola) In typical rest posture with Black antennae tips showing, Hertfordshire, England, UK

Tim Laman / Fern (Blechnum orientale) growing in rainforest, Taveuni Island, Fiji - one frond with pink tips

Tim Laman / Fern (Blechnum orientale) growing in rainforest, Taveuni Island, Fiji. Frond with pink tips.

Mark Moffett / Ant (Mystrium sp) pair, blind, subterranean species with mandibles bend together to touch at their tips, Borneo, Malaysia

Pete Oxford / Fern frond with drip tips, Mindo Cloud Forest, Ecuador

Ingo Arndt / Atlas Moth (Attacus atlas), wing tips mimick a snake's head which prevents birds from attacking, Asia

Ingo Arndt / Atlas Moth (Attacus atlas), wing tips mimick a snake's head which prevents birds from attacking, Asia

Pete Oxford / Kathiawari horse with alert inward-turned ears which meet at the tips. Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

Pete Oxford / Kathiawari horse with alert inward-turned ears which meet at the tips. Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

Pete Oxford / Kathiawari horse with alert inward-turned ears which meet at the tips, performing at the Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

Pete Oxford / Kathiawari horse with alert inward-turned ears which meet at the tips, performing at the Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

Pete Oxford / Kathiawari horse with alert inward-turned ears which meet at the tips. Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

Pete Oxford / Kathiawari horse with inward-turned ears that meet at the tips, Pushkar camel and livestock fair, Pushkar, Rajasthan, India

Pete Oxford / Kathiawari horse breeding at the Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006. The white Kathiawari stallions can command high stud fees, they have the alert inward-turned...

Pete Oxford / Kathiawari horse with alert inward-turned ears which meet at the tips, performing at the Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

Pete Oxford / Kathiawari horse breeding at the Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006. The white Kathiawari stallions can command high stud fees, they have the alert inward-turned...

Pete Oxford / Man riding Kathiawari horse with alert inward-turned ears which meet at the tips, the Pushkar camel and livestock fair, Pushkar, Rajasthan, India, October 2006

GEORGETTE DOUWMA / Broadclub cuttlefish (Sepia latimanus) hunting for fish and crustaceans: Rythmic bands of dark quickly pulsed along the body and arms. If viewed from the front these moving bands converge at the arm t...

GEORGETTE DOUWMA / Broadclub cuttlefish (Sepia latimanus) hunting for fish and crustaceans: Rythmic bands of dark quickly pulsed along the body and arms. If viewed from the front these moving bands converge at the arm t...

Martha Holmes / Staghorn coral with healthy growing white tips {Acropora cervicornis} Grenadine, Caribbean

Kim Taylor / White striped gecko {Gekko vittatus} raising toe tips in readiness to run. Captive.

Adrian Davies / Tidy tips {Layia munzii} California, USA.

PREMAPHOTOS / Wasp nest with drip tips to channel rain, tropical dry forest. Costa Rica {Polybia occidentalis bohemani}

Mark Moffett / Darkling Beetle (Onymacris unguicularis) tips its head down to drink dew collected on its back, Namibia

Gerry Ellis / Leaf drip tips, tropical lowland rainforest, Gombe Stream, Tanzania

Chris Newbert / Bulb Tentacle Sea Anemone (Entacmaea quadricolor) detail of tentacle tips, Fiji

Mark Moffett / Antler-jawed Ant (Myrmoteras sp) kills prey with special trap jaws which can open 280 degrees and spear prey with pitch-fork tips, Malaysia

Mark Moffett / Embera Choco Indian tasting curare from the sap of a tree, curare is used to poison the tips for hunting arrows, Colombia

Mark Moffett / Embera Choco Indian collecting curare from the sap of a tree which is used to poison the tips for hunting arrows, Colombia

Mark Moffett / Stalk-eyed Fly (Cyrtodiopsis whitei) has its eyes at the tips of long stalks much like Hammerhead Sharks, Brunei, Borneo

Fred Bavendam / Australian Giant Cuttlefish (Sepia apama) shooting its tentacles out to grab a fishing lure, the tentacle tips blurred due to speed, South Australia, Australia

Martha Holmes / Pink {Acropora} coral with bleached tips Papua New Guinea

GEORGETTE DOUWMA / ommon reef /Day octopus hunting for crustaceans and fish, enclosing coral head with arms and webs, using the arm tips to flush out prey into waiting suckers {Octopus cyaneus} Andaman Sea, Thailand

GEORGETTE DOUWMA / Common reef / Day octopus hunting for crustaceans and fish using the arm tips to flush out prey into waiting suckers {Octopus cyaneus} Andaman Sea, Thailand

David Noton / Abstract rain drops on leaf tips, rainforest, Cape Tribulation, Queensland, Australia

Nick Upton / Bushy rainbow wrack (Cystoseira tamariscifolia) with blue iridescent tips to its fronds alongside red Harpoon weed (Asparagopsis armata) an invasive species in a rockpool very low on the shore, near F...

Nick Upton / Epiphytic red alga (Ceramium sp.) tufts growing on tips of Thongweed (Himanthalia elongata) fronds just below extreme low water on a spring tide, alongside clumps of Toothed wrack (Fucus serratus) nea...

Nick Upton / Epiphytic red alga (Ceramium sp.) tufts growing on tips of Thongweed (Himanthalia elongata) fronds just below extreme low water on a spring tide, alongside clumps of Toothed wrack (Fucus serratus) nea...

Onne van der Wal / A child colouring on board a Shannon Shoalsailor yacht, Exuma, Bahamas.

Christian Ziegler / Madder (Psychotria acuminata) with flowers at the tips of its twigs, Barro Colorado Island, Panama

Konrad Wothe / European Bee-eater (Merops apiaster) flying with wing tips touching ground, Bulgaria

Mark Moffett / Darkling Beetle (Onymacris unguicularis) tips its head down to drink dew collected on its back, Namib Desert, Namibia