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European tree frog

April 08, 2024

The European tree frog (Hyla arborea) is a small tree frog. As traditionally defined, it was found throughout much of Europe, Asia and northern Africa,[3] but based on molecular genetic and other data several populations formerly included in it are now recognized as separate species (for example, H. intermedia of Italy and nearby, H. molleri of the Iberian Peninsula, H. meridionalis of parts of southwestern Europe and northern Africa, and H. orientalis of parts of Eastern Europe, Turkey and the Black Sea and Caspian Sea regions), limiting the true European tree frog to Europe from France to Poland and Greece.[4][5][6]

European tree frog
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Hylidae
Genus: Hyla
Species:
H. arborea
Binomial name
Hyla arborea
Range as defined by the IUCN in 2009. Some populations (Iberian Peninsula, parts of Eastern Europe, Turkey, and the Black Sea and Caspian Sea regions) are now recognized as separate species
Synonyms[2]
  • Hyla viridi Laurenti, 1768
  • Rana arborea Linnaeus, 1758
  • Rana hyla Linnaeus, 1758

Description edit

 
European tree frog (Hyla arborea) in Kapıçam National Park, Kahramanmaraş

European tree frogs are small; males range from 32–43 mm (1.3–1.7 in) in length, and females range from 40–50 mm (1.6–2.0 in) in length. They are slender, with long legs.[4] Their dorsal skin is smooth, while their ventral skin is granular. Their dorsal skin can be green, gray, or tan depending on the temperature, humidity, or their mood. Their ventral skin is a whitish color, and the dorsal and ventral skin is separated by a dark brown lateral stripe from the eyes to the groin. Females have white throats, while males have golden brown throats[7] with large (folded) vocal sacs. The head of H. arborea is rounded, the lip drops strongly, the pupil has the shape of a horizontal ellipse, and the tympanum is clearly recognizable. The discs on the frog's toes, which it uses to climb trees and hedges, is a characteristic feature of H. arborea . Like other frogs, their hind legs are much larger and stronger than the fore legs, enabling the frogs to jump rapidly.[5]

Distribution and habitat edit

Members of the H. arborea species complex are the only representatives of the widespread tree frog family (Hylidae) indigenous to mainland Europe.[5] and are found across most of Europe (except Ireland),[5][6][8][9] northwest Africa, and temperate Asia to Japan.[7] This species complex is native to these countries:

Albania; Armenia; Austria; Azerbaijan; Belarus; Belgium; Bosnia and Herzegovina; Bulgaria; Croatia; Cyprus; the Czech Republic; Denmark; France; Georgia; Germany; Greece; Hungary; Israel (found in the Ayalon Valley); Italy; Liechtenstein; Lithuania; Luxembourg; Macedonia, the Republic of; Moldova; Montenegro; the Netherlands; Poland; Portugal; Romania; the Russian Federation; Serbia; Slovakia; Slovenia; Sweden; Switzerland; Turkey; Ukraine.[10][1]

It has also been introduced to the United Kingdom,[10] although the species status is contested, with at least one British population, now thought to be extinct, may have been native.[11] Historical evidence suggests that the species could have possibly perished due to over-collection for medicinal use.[12]Celtic Rewilding have proposed a reintroduction to the UK.[13][14] It has been reintroduced to Latvia.[1]

European tree frogs can be found in marshlands, damp meadows, reed beds, parks, gardens,[7] vineyards, orchards, stream banks, lake shores,[10] or humid or dry forests.[4] They tend to avoid dark or thick forests,[10] and they are able to tolerate some periods of dryness; therefore, sometimes they are found in dry habitats.[4]

Behavior edit

  • Historically, tree frogs were used as barometers because they respond to approaching rain by croaking.[5]
  • Depending on subspecies, temperature, humidity, and the frog's 'mood', skin colour ranges from bright to olive green, grey, brown and yellow.[5]
  • European tree frogs eat a variety of small arthropods,[4] such as spiders, flies, beetles, butterflies, and smooth caterpillars.[7] Their ability to take long leaps allow them to catch fast-flying insects, which make up most of their diets.[10]
  • They hibernate in walls, cellars, under rocks, under clumps of vegetation, or buried in leaf piles or manure piles.[15]

Reproduction edit

Male chorus
Calling males at night

European tree frogs reproduce in stagnant bodies of water, such as lakes, ponds, swamps, reservoirs, and sometimes puddles,[1] from late March to June.[7] They croak in the breeding season, even when migrating to their mating pools or ponds.[5] Males will often change breeding ponds, even within the same breeding season.[16] After a spring rain, the males will call females from low vegetation or shallow ponds.[4] About 800 to 1000 eggs are laid in clumps the size of a walnut.[4][7] Individual eggs are about 1.5 mm in diameter. After 10–14 days, the eggs hatch. Then, after three months, tadpoles metamorphose into frogs.[7] Metamorphosis usually peaks from late July to early August.[16] They are able to live for up to 15 years.[7]

Conservation status edit

According to the IUCN Red List of Endangered Species, H. arborea is “listed as Least Concern in view of its wide distribution, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.”[1] However, according to the IUCN, the population trend of H. arborea is decreasing.[1] Some of the main threats to European tree frogs include habitat fragmentation and destruction, pollution of wetlands, predation from fish, capture for the pet trade,[10][1] and climate change.[citation needed] Besides these main threats, other possible reasons for the decline in their populations include increased UVB radiation and local and far-ranging pesticides, fertilizers, and pollutants.[10] Trout have been observed preying on European tree frogs, and in Europe, trout introduced into a pond result in a significant decline in their population. While H. arborea is sensitive to habitat fragmentation, habitat restoration (beginning in the 1980s) has been successful to increase populations. Besides habitat restoration, other attempts to increase population have included building of new breeding ponds, creation of “habitat corridors to connect breeding sites”, and reintroductions. This has been successful in Sweden, Latvia, and Denmark.[15] Habitat protection has been shown to be the most important approach to conserving European tree frog populations.[10]

Gallery edit

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    Formerly included in the European tree frog, the form molleri is now recognized as its own species, the Iberian tree frog
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    Hyla arborea tadpole and metamorph
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    Tadpole with hind legs
  •  
    Newborn tadpoles hatching from frogspawn
  • European tree frogs in Witte Veen [nl]

References edit

 
Wikimedia Commons has media related to Hyla arborea.
 
Wikispecies has information related to Hyla arborea.
  1. ^ a b c d e f g IUCN SSC Amphibian Specialist Group (2022). "Hyla arborea". IUCN Red List of Threatened Species. 2022: e.T82496838A82495296. doi:10.2305/IUCN.UK.2022-1.RLTS.T82496838A82495296.en. Retrieved 19 November 2021.
  2. ^ "Hyla arborea (Linnaeus, 1758)". Global Biodiversity Information Facility. Retrieved 31 December 2018.
  3. ^ Frost, Darrel R. Amphibian Species of the World. Allen Press, Inc., 1985, p. 126.
  4. ^ a b c d e f g Duellman, William E. (2003). Grzimek's Animal Encyclopedia. 2nd Ed., Vol. 2. Gale, p. 235.
  5. ^ a b c d e f g Stöck M., Dubey S., Klütsch C., Litvinchuk S.N., Scheidt U., and Perrin N. (2008). Mitochondrial and nuclear phylogeny of circum-Mediterranean tree frogs from the Hyla arborea group. Molecular Phylogenetics and Evolution 49: 1019-1024.
  6. ^ a b Stöck M., Dufresnes C., Litvinchuk S.N., Lymberakis P., Biollay S., Berroneau M., Borzée A., Ghali K., Ogielska M., and Perrin N. (2012). Cryptic diversity among Western Palearctic tree frogs: Postglacial range expansion, range limits, and secondary contacts of three European tree frog lineages (Hyla arborea group). Molecular Phylogenetics and Evolution 65: 1-9.
  7. ^ a b c d e f g h Haltenorth, T. (1979). British and European Mammals, Amphibians, and Reptiles. Irwin & Co. Ltd., p. 126.
  8. ^ Masó, A. and M. Pijoan (2011). Anfibios y reptiles de la península ibérica, Baleares y Canarias (in Spanish) Barcelona: Omega. Pp. 848. ISBN 978-84-282-1368-4
  9. ^ Amphibian Species of the World: an Online Reference. Version 5.4 (8 April 2010). Frost, Darrel R. American Museum of Natural History, New York, USA.
  10. ^ a b c d e f g h "Hyla arborea". Amphibiaweb.org. 2010. Retrieved 2 December 2010.
  11. ^ Naish, Darren. Britain’s lost tree frogs: sigh, not another ‘neglected native’. 2007. Retrieved 20 December 2017.
  12. ^ Raye, Lee (2017). "Frogs in pre-industrial Britain". Herpetological Journal. 27 (4): 368–378.
  13. ^ Barkham, Patrick (2021-01-10). "'Who doesn't love a turtle?' The teenage boys on a mission – to rewild Britain with reptiles". The Guardian. ISSN 0261-3077. Retrieved 2023-11-13.
  14. ^ Mark, Avery (January 14, 2021). "Guest blog by Celtic Reptile and Amphibian".
  15. ^ a b Wells, K. D. ‘‘The Ecology of Behavior of Amphibians.’’ The University of Chicago, 2007.
  16. ^ a b Lardner, B. (2000). Morphological and life history responses to predators in larvae of seven anurans. Oikos, 88(1): 169–180.

April 08, 2024
european, tree, frog, hyla, arborea, small, tree, frog, traditionally, defined, found, throughout, much, europe, asia, northern, africa, based, molecular, genetic, other, data, several, populations, formerly, included, recognized, separate, species, example, i. The European tree frog Hyla arborea is a small tree frog As traditionally defined it was found throughout much of Europe Asia and northern Africa 3 but based on molecular genetic and other data several populations formerly included in it are now recognized as separate species for example H intermedia of Italy and nearby H molleri of the Iberian Peninsula H meridionalis of parts of southwestern Europe and northern Africa and H orientalis of parts of Eastern Europe Turkey and the Black Sea and Caspian Sea regions limiting the true European tree frog to Europe from France to Poland and Greece 4 5 6 European tree frogConservation statusLeast Concern IUCN 3 1 1 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass AmphibiaOrder AnuraFamily HylidaeGenus HylaSpecies H arboreaBinomial nameHyla arborea Linnaeus 1758 Range as defined by the IUCN in 2009 Some populations Iberian Peninsula parts of Eastern Europe Turkey and the Black Sea and Caspian Sea regions are now recognized as separate speciesSynonyms 2 Hyla viridi Laurenti 1768 Rana arborea Linnaeus 1758 Rana hyla Linnaeus 1758 Contents 1 Description 2 Distribution and habitat 3 Behavior 4 Reproduction 5 Conservation status 6 Gallery 7 ReferencesDescription edit nbsp European tree frog Hyla arborea in Kapicam National Park KahramanmarasEuropean tree frogs are small males range from 32 43 mm 1 3 1 7 in in length and females range from 40 50 mm 1 6 2 0 in in length They are slender with long legs 4 Their dorsal skin is smooth while their ventral skin is granular Their dorsal skin can be green gray or tan depending on the temperature humidity or their mood Their ventral skin is a whitish color and the dorsal and ventral skin is separated by a dark brown lateral stripe from the eyes to the groin Females have white throats while males have golden brown throats 7 with large folded vocal sacs The head of H arborea is rounded the lip drops strongly the pupil has the shape of a horizontal ellipse and the tympanum is clearly recognizable The discs on the frog s toes which it uses to climb trees and hedges is a characteristic feature of H arborea Like other frogs their hind legs are much larger and stronger than the fore legs enabling the frogs to jump rapidly 5 Distribution and habitat editMembers of the H arborea species complex are the only representatives of the widespread tree frog family Hylidae indigenous to mainland Europe 5 and are found across most of Europe except Ireland 5 6 8 9 northwest Africa and temperate Asia to Japan 7 This species complex is native to these countries Albania Armenia Austria Azerbaijan Belarus Belgium Bosnia and Herzegovina Bulgaria Croatia Cyprus the Czech Republic Denmark France Georgia Germany Greece Hungary Israel found in the Ayalon Valley Italy Liechtenstein Lithuania Luxembourg Macedonia the Republic of Moldova Montenegro the Netherlands Poland Portugal Romania the Russian Federation Serbia Slovakia Slovenia Sweden Switzerland Turkey Ukraine 10 1 It has also been introduced to the United Kingdom 10 although the species status is contested with at least one British population now thought to be extinct may have been native 11 Historical evidence suggests that the species could have possibly perished due to over collection for medicinal use 12 Celtic Rewilding have proposed a reintroduction to the UK 13 14 It has been reintroduced to Latvia 1 European tree frogs can be found in marshlands damp meadows reed beds parks gardens 7 vineyards orchards stream banks lake shores 10 or humid or dry forests 4 They tend to avoid dark or thick forests 10 and they are able to tolerate some periods of dryness therefore sometimes they are found in dry habitats 4 Behavior editHistorically tree frogs were used as barometers because they respond to approaching rain by croaking 5 Depending on subspecies temperature humidity and the frog s mood skin colour ranges from bright to olive green grey brown and yellow 5 European tree frogs eat a variety of small arthropods 4 such as spiders flies beetles butterflies and smooth caterpillars 7 Their ability to take long leaps allow them to catch fast flying insects which make up most of their diets 10 They hibernate in walls cellars under rocks under clumps of vegetation or buried in leaf piles or manure piles 15 Reproduction edit source source Male chorus source source source source source source source source Calling males at nightEuropean tree frogs reproduce in stagnant bodies of water such as lakes ponds swamps reservoirs and sometimes puddles 1 from late March to June 7 They croak in the breeding season even when migrating to their mating pools or ponds 5 Males will often change breeding ponds even within the same breeding season 16 After a spring rain the males will call females from low vegetation or shallow ponds 4 About 800 to 1000 eggs are laid in clumps the size of a walnut 4 7 Individual eggs are about 1 5 mm in diameter After 10 14 days the eggs hatch Then after three months tadpoles metamorphose into frogs 7 Metamorphosis usually peaks from late July to early August 16 They are able to live for up to 15 years 7 Conservation status editAccording to the IUCN Red List of Endangered Species H arborea is listed as Least Concern in view of its wide distribution presumed large population and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category 1 However according to the IUCN the population trend of H arborea is decreasing 1 Some of the main threats to European tree frogs include habitat fragmentation and destruction pollution of wetlands predation from fish capture for the pet trade 10 1 and climate change citation needed Besides these main threats other possible reasons for the decline in their populations include increased UVB radiation and local and far ranging pesticides fertilizers and pollutants 10 Trout have been observed preying on European tree frogs and in Europe trout introduced into a pond result in a significant decline in their population While H arborea is sensitive to habitat fragmentation habitat restoration beginning in the 1980s has been successful to increase populations Besides habitat restoration other attempts to increase population have included building of new breeding ponds creation of habitat corridors to connect breeding sites and reintroductions This has been successful in Sweden Latvia and Denmark 15 Habitat protection has been shown to be the most important approach to conserving European tree frog populations 10 Gallery edit nbsp nbsp nbsp nbsp nbsp nbsp nbsp Formerly included in the European tree frog the form molleri is now recognized as its own species the Iberian tree frog nbsp Hyla arborea tadpole and metamorph nbsp Tadpole with hind legs nbsp Newborn tadpoles hatching from frogspawn source source European tree frogs in Witte Veen nl References edit nbsp Wikimedia Commons has media related to Hyla arborea nbsp Wikispecies has information related to Hyla arborea a b c d e f g IUCN SSC Amphibian Specialist Group 2022 Hyla arborea IUCN Red List of Threatened Species 2022 e T82496838A82495296 doi 10 2305 IUCN UK 2022 1 RLTS T82496838A82495296 en Retrieved 19 November 2021 Hyla arborea Linnaeus 1758 Global Biodiversity Information Facility Retrieved 31 December 2018 Frost Darrel R Amphibian Species of the World Allen Press Inc 1985 p 126 a b c d e f g Duellman William E 2003 Grzimek s Animal Encyclopedia 2nd Ed Vol 2 Gale p 235 a b c d e f g Stock M Dubey S Klutsch C Litvinchuk S N Scheidt U and Perrin N 2008 Mitochondrial and nuclear phylogeny of circum Mediterranean tree frogs from the Hyla arborea group Molecular Phylogenetics and Evolution 49 1019 1024 a b Stock M Dufresnes C Litvinchuk S N Lymberakis P Biollay S Berroneau M Borzee A Ghali K Ogielska M and Perrin N 2012 Cryptic diversity among Western Palearctic tree frogs Postglacial range expansion range limits and secondary contacts of three European tree frog lineages Hyla arborea group Molecular Phylogenetics and Evolution 65 1 9 a b c d e f g h Haltenorth T 1979 British and European Mammals Amphibians and Reptiles Irwin amp Co Ltd p 126 Maso A and M Pijoan 2011 Anfibios y reptiles de la peninsula iberica Baleares y Canarias in Spanish Barcelona Omega Pp 848 ISBN 978 84 282 1368 4 Amphibian Species of the World an Online Reference Version 5 4 8 April 2010 Frost Darrel R American Museum of Natural History New York USA a b c d e f g h Hyla arborea Amphibiaweb org 2010 Retrieved 2 December 2010 Naish Darren Britain s lost tree frogs sigh not another neglected native 2007 Retrieved 20 December 2017 Raye Lee 2017 Frogs in pre industrial Britain Herpetological Journal 27 4 368 378 Barkham Patrick 2021 01 10 Who doesn t love a turtle The teenage boys on a mission to rewild Britain with reptiles The Guardian ISSN 0261 3077 Retrieved 2023 11 13 Mark Avery January 14 2021 Guest blog by Celtic Reptile and Amphibian a b Wells K D The Ecology of Behavior of Amphibians The University of Chicago 2007 a b Lardner B 2000 Morphological and life history responses to predators in larvae of seven anurans Oikos 88 1 169 180 Retrieved from https en wikipedia org w index php title European tree frog amp oldid 1217072619, wikipedia, wiki, book, books, library,

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