My main study interests focus on investigating unusual adaptations and reproductive strategies in Neotropical tree frogs, combining field studies with captive observations. My most recent study is concerned with investigating evolutionary traits and variation between and within Leaf frog species. I am particularly interested in speciation, colouration, and the unusual pigments contained in their skin.

All the studies conducted are completely non-invasive and aim to provide a better understanding of these wonderful frogs, specifically to aid their conservation.

On an annual basis I also supervise a variety of undergraduate and graduate student projects at the University of Manchester and abroad as well as leading expeditions to remote areas of the world to search for and work with rare frogs.

Gray, A. R (2011). Notes on Hybridization in Leaf frogs of the genus Agalychnis   (Anura, Hylidae, Phyllomedusinae), Cornell University and the National Science Institutes’ ArXiv:1102.4039v1, can be viewed as a high quality printable PDF or online at:

Related posts and links:

One of a KInd 

Live Science

Collecting frog DNA

Payamino Project

Examples of student  placements and supervised projects:

International Placement supervision

2 examples of student projects: Eye Morphology and Gliding Ability in leaf frogs.

2008 Expedition

BBC Expedition blog

Rare frog found

Frog re-discoveries

Isthmohyla rivularis rediscovered



Good vibrations

Skin Pigments:

Infra-red reflectance

Science daily

National Geographic


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