Heather Angel / Tulip tree (Liriodendron tulipifera) flower with orange band to attract bees, produces copious nectar. In visible light. Surrey, England, UK. Native to USA. Focus stacked. Sequence 1/2.

Heather Angel / Tulip tree (Liriodendron tulipifera) flower, pollen and nectar fluorescing in UV light. Surrey, England, UK. Native to USA. Focus stacked. Sequence 2/2.

Kirkendall-Spring / African Tulip Tree (Spathodea campanulata) with red flowers and seed capsules in the North Kohala area, Hawaii. December 2016. Invasive species.

Kirkendall-Spring / African Tulip Tree (Spathodea campanulata) with red flowers and seed capsules in the North Kohala area, Hawaii. December 2016. Invasive species.

Kirkendall-Spring / Rainforest area with native Coconut trees (Cocos nucifera) and invasive African tulip trees (Spathodea campanulata), North Kohala, Hamakua Coast, Hawaii. December 2016.

Kirkendall-Spring / Nanue Falls along Akoni Pule Highway (Highway 270) with native Coconut trees (Cocos nucifera) and invasive African tulip trees (Spathodea campanulata), Hamakua Coast, Hawaii. December 2016.

Phil Savoie / Clay-colored robin (Turdus grayi), drinking from flower of African tulip tree (Spathodea campanulata) Costa Rica. This tree is an invasive species.

Phil Savoie / Clay-colored robin (Turdus grayi), drinking from flower ofAfrican tulip tree (Spathodea campanulata) Costa Rica. This tree is an invasive species.

Phil Savoie / Clay-colored robin (Turdus grayi), drinking from flower ofAfrican tulip tree (Spathodea campanulata) Costa Rica. This tree is an invasive species.

Phil Savoie / Green-crowned brilliant hummingbird (Heliodoxa jacula) drinking from nectar of African tulip tree (Spathodea campanulata) Costa Rica. This tree is an invasive species.

Ernie Janes / Cultivated tulips (Tulipa) with Apple blossom (Malus domestica) in background. April. England, UK.

John Abbott / Tulip-tree beauty moth (Epimecis hortaria) Texas, USA, April.

Cyril Ruoso / African tulip tree (Spathodea) in flower, Boje Village, Nigeria.

Fiona Rogers / Blue Monkey (Cercopithecus mitis) feeding on African Tulip Tree (Spathodea sp) seed pods, Kakamega Forest Reserve, Kenya

Fiona Rogers / Blue Monkey (Cercopithecus mitis) feeding on African Tulip Tree (Spathodea sp) seed pods, Kakamega Forest Reserve, Kenya

Anup Shah / Blue Monkey (Cercopithecus mitis) feeding on African Tulip Tree (Spathodea sp) seed pods, Kakamega Forest Reserve, Kenya

Kevin Schafer / African Tulip Tree (Spathodea campanulata) flowers, Santa Cruz Island, Galapagos Islands, Ecuador

Stephen Dalton / Tulip tree flower (Liriodendron tulipifera), UK, June

Stephen Dalton / Tulip tree flower (Liriodendron tulipifera), UK, June

Adrian Davies / Tulip tree (Liriodendron tulipifera) leaves in autumn, Botanic garden, Surrey, England, UK, October

Piotr Naskrecki / Tulip Tree (Liriodendron tulipifera) leaves, Estabrook Woods, Massachusetts

Nature Production / Japanese Tree Frog (Hyla japonica) on tulip flower, Japan, April

Martin Gabriel / Tulip tree (Liriodendron tulipifera), city park of Badenweiler, Black Forest, Germany, May

Philippe Clement / Tulip tree / Tulip poplar / Yellow poplar (Liriodendron tulipifera) leaf in autumn colours, native to eastern North America

Philippe Clement / Parkland in autumn with Beech tree (Fagus sylvatica) and Tulip tree / Yellow poplar (Liriodendron tulipifera) Nobvember, Belgium

GEORGETTE DOUWMA / Flower of Tulip tree / Yellow poplar (Liriodendron tulipifera) The tallest hardwood tree in eastern North America. USA

GEORGETTE DOUWMA / Flower of Tulip tree / Yellow poplar (Liriodendron tulipifera)

GEORGETTE DOUWMA / Flower of Tulip tree / Yellow poplar (Liriodendron tulipifera) The tallest hardwood tree in eastern North America. USA

GEORGETTE DOUWMA / Tulip tree / Yellow poplar (Liriodendron tulipifera) The tallest hardwood tree in eastern North America. USA

Ross Hoddinott / Tulip tree leaves {Liriodendron tulipifera} emerging, RHS Rosemoor, Devon. UK

Doug Wechsler / Tulip tree or Tulip poplar {Liriodendron tulipifera} in winter, Philadelphia, USA

Doug Wechsler / Maple, Tulip tree and Birch tree trunks (right to left) in woodlands, Pennsylvania, USA

Gerry Ellis / African Tulip Tree (Spathodea campanulata), blossoms, El Yunque National Forest, Puerto Rico

Tim Fitzharris / White Ash (Fraxinus americana) Boxelder (Acer negundo) Sycamore (Acer pseudoplatanus) tulip tree and red bud leaves, Ohio

Fiona Rogers / Blue Monkey (Cercopithecus mitis) female drinking from African Tulip Tree (Spathodea sp) flowers, Kakamega Forest Reserve, Kenya

Martin Gabriel / Tulip tree (Liriodendron tulipifera), city park of Badenweiler, Black Forest, Germany, May

Roland Seitre / New Caledonia rainbow lory (Trichoglossus haematodus deplanchii) perched on African tulip tree (Spathodea campanulata) flower, New Caledonia.

Roland Seitre / New Caledonia rainbow lory (Trichoglossus haematodus deplanchii) perched on African tulip tree (Spathodea campanulata) flower, New Caledonia.

Tom Vierus / Pink-billed parrotfinch (Erythrura kleinschmidti) enters frame and lands on a branch. The bird looks around and then enters its nest. The nest has been built on an invasive African tulip tree (Spathod...

Doug Wechsler / Tulip-tree beauty moth (Epimecis hortaria) caterpillar on Tulip tree (Liriodendron tulipifera) trunk, Montgomery County, Pennsylvania, USA. June.

Doug Wechsler / Flower of Tulip-tree (Liriodendron tulipifera), Montgomery County, Pennsylvania, USA. May.

Doug Wechsler / Ferruginous carpenter ant (Camponotus chromaiodes) getting honeydew from Tulip tree scale insect (Toumeyella liriodendri) Camp Woods Preserve, Pennsylvania, USA, August.

Doug Wechsler / Ferruginous carpenter ant (Camponotus chromaiodes) getting honeydew from Tulip tree scale insect (Toumeyella liriodendri) Camp Woods Preserve, Pennsylvania, USA, August.

Doug Wechsler / Tulip tree aphid (Illinoia liriodendri) with nymphs, Phliadelphia, Pennsylvania, USA, May.

Derek Galon / African tulip tree (Spathodea campanulata) seeds, Dominica, Eastern Caribbean.

Derek Galon / African tulip tree (Spathodea campanulata) seeds, Dominica, Eastern Caribbean.

Derek Galon / Aerial view of African Tulip tree (Spathodea Campanulata) in full bloom, in tropical forest recovering after hurricane Maria in Dominica, West Indies. March.

Derek Galon / Aerial view of African Tulip tree (Spathodea Campanulata) in full bloom, in tropical forest recovering after hurricane Maria in Dominica, West Indies. March.