Frog of the Week

Apennine Yellow-bellied Toad (Bombina pachypus)

Alpine Yellow Bellied Toad
photo by Benny Trapp

Conservation status is Endangered
Common Name: Apennine Yellow-bellied Toad
Scientific Name: Bombina pachypus
Family: Bombinatoridae
Locations Italy
Size: 1.3 inches to 2.1 inches or 35-55 mm

The Apennine Yellow-bellied Toad is a diurnal (active during the day) species of toad, which is kinda unusual for most frogs and toads. It probably has to do with the fact that the Apennine Yellow-bellied Toad needs to show off its bright, yellow belly to warn predators that they are toxic. It would be hard to see if its dark out.  Other frogs and toads want to stay hidden during the day to avoid predators. When threatened by a predator, the Apennine Yellow-bellied Toad arch their back to show off their belly. This is called the unken reflex.

The Apennine Yellow-bellied Toad hibernates from November to late April. I wish I could hibernate during that time too. After waking up, the toads get to work to start breeding. They breed from May all the way to September. Mating takes place in temporary bodies of water. Females lay a couple eggs to a couple dozen of eggs.

Populations of the Apennine Yellow-bellied Toad have been decreasing. It is thought that Chytrid Fungus is one of the culprits behind the drops. Chytrid Fungus is a deadly disease affecting amphibians around the globe. The Apennine Yellow-bellied Toad was the first Italian species of amphibian to be confirmed to have Chytrid Fungus. Another reason for the declines include habitat loss due to farming.

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