During the last glaciation, a huge ice shield reached up to the region of today's Berlin. By the time it started to melt about 20.000 years ago, it enabled a gradual re-colonization of the northern ...

A juvenile American tree frog (Hyla cinerea) of unknown age was presented to the Exotic Service at the Tufts University School of Veterinary Medicine for an acute onset of swelling of the left front ...

The Gladiator tree frog (Hyla rosenbergi) is named for the fighting behavior of males among some populations. The male Gladiator tree frog has a bony spine (an “unsheathed prepollex spine”) on each ...

While working on her PhD in 1992, Karen Lips went to Las Tablas, Panama, to study the biology of a tree frog, Hyla calypso, an inch-long, spiny, bright-green creature. As she walked through transects ...

While poking around the garden the other day I found an adorable visitor, a small frog called a gray tree frog (Hyla versicolor) resting among the brightly colored flowers. This amazing little ...

Preface -- General account -- Common names -- Present classifications -- Scientific name -- Specific evaluation of our North American forms -- Range -- Habitat ...

Extremes of the colour gradient of the Eastern San Antonio frog (Hyla orientalis). On the left, a specimen captured in Chernobyl inside the high contamination zone; on the right, a specimen captured ...

During the last glaciation, a huge ice shield reached up to the region of today’s Berlin. By the time it started to melt about 20,000 years ago, it enabled a gradual re-colonization of the northern ...