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A Guide to the Amphibians
and Reptiles of California





Eggs and Tadpoles of
Foothill Yellow-legged Frog - Rana boylii

Baird, 1854
 













observation link

 
Eggs
rana boylii eggs rana boylii eggs rana boylii eggs rana boylii eggs
Eggs in a Santa Clara County creek
© Neil Keung  
Recently-laid egg mass attached to a rock in a creek in Linn County, Oregon Egg mass attached to a rock in a creek in Linn County, Oregon Eggs ready to hatch,
Linn County, Oregon
rana boylii eggs rana boylii eggs rana boylii eggs foothill yellow-legged frog eggs
Egg masses underwater in a creek, Linn County, Oregon. Notice the silt covering the eggs. This helps to hide the eggs, reducing predation upon them. In the foreground of the picture on the left, you can see the large mass of eggs shown in close-up on the right that dried out when either the water level dropped or, more likely, when a careless person removed the eggs from the water.

An egg mass in a Sonoma County creek.
© egret.org / Audubon Canyon Ranch
foothill yellow-legged frog eggs foothill yellow-legged frog eggs    
Adult male and female in amplexus next to an egg mass in a Sonoma County creek.
© egret.org / Audubon Canyon Ranch
   
       
Tadpoles
rana boylii tadpole rana boylii tadpole rana boylii tadpole rana boylii tadpole
Hatchlings, just hatched, Linn County, Oregon Tadpole underwater, Santa Clara County Tadpole underwater, Santa Clara County Tadpole with 4 legs, shown underwater, Santa Clara County
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Tadpole with rear legs shown underwater, Santa Clara County Recently-hatched tadpoles (egg cluster below left) Linn County, Oregon
rana boylii tadpole rana boylii tadpole rana boylii tadpole rana boylii tadpole
Tadpole underwater, Douglas County, Oregon Tadpole underwater,
Douglas County, Oregon
rana boylii tadpole rana boylii tadpole    
Tadpole underside and mouth
on a glass surface.
Rana boylii - Left
Pseudacris regilla - Right

From above, the eyes of Rana boylii are located on top of the head and the eyes of Pseudacris regilla are located at the sides of the head.
   
tadpoles tadpoles
Comparisons of a California Red-legged Frog tadpole and a Foothill Yellow-legged Frog tadpole, both from Santa Clara County. © Owen Holt
 
Eggs and Tadpole Habitat
rana boylii habitat rana boylii habitat rana boylii habitat  
Breeding habitat with eggs attached to rocks in foreground, Linn County, Oregon

Breeding habitat with eggs attached to rocks in foreground, Linn County, Oregon Tadpole habitat, Santa Clara County  
Short Video
  rana boylii tadpole    
  Tadpoles feeding in a rocky creek in Douglas County, Oregon.




   

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