Hyla intermedia
System : Freshwater_terrestrial
Kingdom
Phylum
Class
Order
Family
Animalia
Chordata
Amphibia
Anura
Hylidae
  • Not Evaluated
    NE
  • No Alien Population
    NA
  • Data Deficient
    DD
  • Minimal Concern
    MC
  • Minor
    MN
  • Moderate
    MO
  • Major
    MR
  • Massive
    MV
  • General
  • Distribution
  • Impact
  • Management
  • Bibliography
  • Contact
Common name
Italienischer Laubfrosch (German), Italian Tree Frog (English), Raganella Italiana (Italian)
Synonym
Hylaria variegata ,Rafinesque, 1814
Hyla italica ,Nascetti, Lanza and Bullini, 1995
Hyla arborea subsp. Intermedia ,Boulenger, 1882
Similar species
Summary
Hyla intermedia was introduced into the Rhone valley, Switzerland. Hybrid populations of Hyla intermedia and the regionally endangered European tree frog (Hyla arborea) have been recorded. The genetic integrity of the local species is endangered.
Habitat Description
"This species is associated with lowland woodland and forest, and is sometimes found in slightly modified habitats. It breeds in small stagnant waters" (IUCN SSC Amphibian Specialist Group, 2022).

Principal source:

Compiler: Shyama Pagad (IUCN SSC Invasive Species Specialist Group)

Review:

Publication date:

Recommended citation: Global Invasive Species Database (2026) Species profile: Hyla intermedia. Downloaded from http://www.iucngisd.org/gisd/speciesname/Hyla+intermedia on 05-03-2026.

Countries (or multi-country features) with distribution records for Hyla intermedia
ALIEN RANGE
NATIVE RANGE
  • italy
Informations on Hyla intermedia has been recorded for the following locations. Click on the name for additional informations.
Lorem Ipsum
Location Status Invasiveness Occurrence Source
Details of Hyla intermedia in information
Status
Invasiveness
Arrival date
Occurrence
Source
Introduction
Species notes for this location
Location note
Management notes for this location
Impact
Mechanism:
Outcome:
Ecosystem services:
Impact information
Red List assessed species 1: LC = 1;
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Locations
SWITZERLAND
Mechanism
[1] Hybridisation
Outcomes
[1] Environmental Species - Population
  • [1] Alteration of genetic resources
Management information
Contact
The following 0 contacts offer information an advice on Hyla intermedia
MV
Hyla intermedia
Italienischer Laubfrosch, Italian Tree Frog, Raganella Italiana
Date assessed
2020-12-05
Year published
2021
Eicat category
MV (Massive)
Justification for EICAT assessment


The hybridisation between the introduced H. intermedia and the endangered H. arborea is common in the impacted region (with the paper claiming that all individuals in the impacted populaton are hybrids, Dufresnes et al. 2015). As such this represents a decline, or potential extinction, of the genetically pure population of the H. arborea. The paper does note, however, that the native population of the endangered H. arborea may be recoved with increased human effort if H. intermedia were to be removed.
Confidence rating
Low
Mechanism(s) of maximum impact
Hybridisation
Countries of most severe impact
Switzerland
Description of impacts
Hybridisation- Hyla intermedia has been reported to hybridize with the endangered European Trea Frog (H. arborea), thereby causing an extripation of the genetically pure population of native H. arborea.
Assessor
James Baxter-Gilbert; Alexander D. Rebelo
Contributors
Sabrina Kumschick; John Measey; Mohlamatsane Mokhatla; Corey Thorp; Giovanni Vimercati; Sarah J. Davies; F. André de Villiers; Nitya Prakash Mohanty; Khensani Nkuna; Carla Wagener
Reviewers
EICAT authority
Recommended citation
James Baxter-Gilbert, Alexander D. Rebelo (2026). Hyla intermedia. IUCN Environmental Impact Classification for Alien Taxa (EICAT).