Overview
Amphibian. The bullfrog has been widely distributed via aquaculture and the aquarium trade. It is one of the most frequently cultivated edible frogs , worldwide. Primary concerns are competition with and predation upon native herpetofauna.
Interesting Facts
Common Names
Click on the language to view common names.
Common Names in English:
American Bullfrog, bullfrog, bullfrogs, North American bullfrog
Common Names in French:
Grenouille taureau, ouaouaron
Common Names in German:
Ochsenfrosch
Common Names in Japanese:
ウシガエル
Common Names in Spanish:
Rana toro
Description
Physical Description
Species Rana catesbeiana
Dorsal color is light green to olive to brownish-green, often with a mottled pattern of greens and browns. A fold of skin runs from the eye around conspicuous eardrums. The mostly white ventral surface may be mottled with gray.
Size/Age/Growth
Large size: adults 10-20 cm snout-to-vent length and 60-900 g.
Habitat
Prefers to live in larger bodies of water, and particularly in grasses along the banks of quiet waters.
Typically found at an altitude of 0 to 5,478 meters (0 to 17,972 feet).[1]
Ecology:
This species inhabits ponds
, swamps
, lakes
, reservoirs
, marshes,
brackish
ponds (in Hawaii), stream
margins
and irrigation
ditches.
It is sometimes found in temporary waters hundreds
of metres
from
permanent water. It winters at the bottom
of pools
. It may disperse
from water in wet weather. Eggs
and larvae develop in permanent slow
or non-flowing bodies of water.
List of Habitats
:
1.4
Forest
- Temperate
3.4
Shrubland - Temperate
4.4
Grassland - Temperate
5.1
Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes
waterfalls
)
5.2
Wetlands (inland) - Seasonal/Intermittent/Irregular Rivers/Streams/Creeks
5.4
Wetlands (inland) - Bogs
, Marshes, Swamps, Fens
, Peatlands
5.5
Wetlands (inland) - Permanent Freshwater
Lakes (over 8ha)
5.6
Wetlands (inland) - Seasonal/Intermittent Freshwater Lakes (over
8ha)
5.7
Wetlands (inland) - Permanent Freshwater Marshes/Pools (under
8ha)
5.8
Wetlands (inland) - Seasonal/Intermittent Freshwater Marshes/Pools
(under 8ha)
5.9
Wetlands (inland) - Freshwater Springs and Oases
5.13
Wetlands (inland) - Permanent Inland Deltas
14.1
Artificial/Terrestrial - Arable Land
14.2
Artificial/Terrestrial - Pastureland
14.4
Artificial/Terrestrial - Rural Gardens
14.5
Artificial/Terrestrial - Urban Areas
15.1
Artificial/Aquatic - Water Storage Areas (over 8ha)
15.2
Artificial/Aquatic - Ponds (below 8ha)
15.3
Artificial/Aquatic - Aquaculture Ponds
15.5
Artificial/Aquatic - Excavations (open)
15.7
Artificial/Aquatic - Irrigated Land (includes irrigation channels)
15.8
Artificial/Aquatic - Seasonally Flooded Agricultural Land
15.9
Artificial/Aquatic - Canals and Drainage
Channels
, Ditches
Biology
Diet
Larvae eat organic debris , algae, plant tissue , suspended matter and small aquatic invertebrates . Adults consume any animal that can be swallowed, even snakes , bids, fish, crawfish, and other frogs . It is a voracious feeder and eats almost anything that it can swallow, including insects, crayfish, earthworms, leeches, spiders, snails, salamanders, frogs, snakes, turtles, lizards, fishes , birds, shrews, moles , and bats.
Reproduction
Sexual. Breeds
from February to October. Its call
sounds
like a jug
o'rum. External fertilization of unshelled eggs
takes place as
the eggs are deposited in water. Egg masses are attached to vegetation
which is in water. The jelly-coated eggs form a floating raft which
may measure as much as a meter across. Eggs hatch
in 3-5 days. Bullfrogs
breed from early spring
through late summer, depending upon local
climate.Gravid females commonly contain from 1,000 to 20,000 eggs,
with larger females producing larger clutches. Maximum clutch
size
is over 40,000 eggs. They will produce
multiple
clutches in a season
under favorable conditions.
These amphibians
undergo a completely aquatic
life stage before metamorphosing
into semi-aquatic adults
. This larval stage
is variable in length
,
from 4 months to over 2 years, taking longer
in colder climates.
Behavior
This frog
is highly aquatic
, and never strays far from permanent
water, whether it be marsh
, pond
, lake
, or reservoir
. It sometimes
frequents temporary water bodies long distances
from permanent water.
It prefers water with thick aquatic vegetation such as cattails and
can even tolerate brackish water. The Bull
Frog is not dependent
on rainfall for breeding. It is nocturnal
but calling commonly occurs
during the day as well. The Bull Frog winters at the bottom
of water
bodies.
The Bullfrog is eaten by water snakes
, snapping turtles, large fish,
herons, opossums, skunks, and raccoons. To escape
cold winter temperatures
,
the Bullfrog burrows into the mud
at the bottom of lakes, streams
,
or ponds.
Call is a deep pitched "jug-o-rum" or "Br-wum" bellow. Calls are made during the day and night. It can be heard up to 1/4 mile away.
Taxonomy
- Domain:
Eukaryota
(
)
- Whittaker & Margulis,1978
- eukaryotes
- Kingdom:
Animalia
(
)
- C. Linnaeus, 1758
- animals
- Subkingdom:
Bilateria
(
)
- (Hatschek, 1888) Cavalier-Smith, 1983
- Branch:
Deuterostomia
(
)
- Grobben, 1908
- Infrakingdom:
Chordonia
(
)
- (Haeckel, 1874) Cavalier-Smith, 1998
- Phylum:
Chordata
(
)
- Bateson, 1885
- Chordates
- Subphylum:
Vertebrata
(
)
- Cuvier, 1812
- Vertebrates
- Infraphylum:
Gnathostomata
(
)
- auct.
- Jawed Vertebrates
- Superclass:
Tetrapoda
(
)
- Goodrich, 1930
- Class:
Amphibia
(
)
- Gray, 1825
- Subclass:
Lissamphibia
(
)
- Haeckel, 1866
- Infraclass:
Lissamphibia
(
)
- Order:
Anura
(
)
- (Fischer von Waldheim, 1813) Gray, 1825
- Suborder:
Neobatrachia
(
)
- Reig, 1958
- Suborder:
Neobatrachia
(
- Order:
Anura
(
- Infraclass:
Lissamphibia
(
- Subclass:
Lissamphibia
(
- Class:
Amphibia
(
- Superclass:
Tetrapoda
(
- Infraphylum:
Gnathostomata
(
- Subphylum:
Vertebrata
(
- Phylum:
Chordata
(
- Infrakingdom:
Chordonia
(
- Branch:
Deuterostomia
(
- Subkingdom:
Bilateria
(
- Kingdom:
Animalia
(
Notes
Name Status: Accepted Name . Latest taxonomic scrutiny: 29-Aug-2005.
Similar Species
The largest frog in North America, this frog ranges from yellowish green to brown. It can be distinguished from the Green Frog because it does not have dorsolateral ridges. The Pig Frog has webbing to the very tips of the toes. The River Frog has white spots on its lips.
Members of the genus Rana
ZipcodeZoo has pages for 132 species and subspecies in this genus. Here are just 100 of them:
R. adenopleura (Olive Frog) · R. amurensis (Siberian Wood Frog) · R. andersonii (Yunnan Odorous Frog) · R. areolata (Northern Crawfish Frog) · R. areolata aesopus (Crawfish Frog) · R. areolata areolata (Southern Crawfish Frog) · R. areolata circulosa (Northern Crawfish Frog) · R. arfaki (Arfak Mountains Frog) · R. arvalis (Altai Brown Frog (Altai Mountains Populations)) · R. asiatica (Central Asiatic Frog) · R. asperata (Yangambi Butterbarbel) · R. aurantiaca (Golden Frog) · R. aurora (California Red-Legged Frog) · R. aurora aurora (Northern Red-Legged Frog) · R. aurora draytonii (California Red-Legged Frog) · R. baramica (Baram River Frog) · R. bergeri (Italian Poolfrog) · R. berlandieri (Rio Grande Leopard Frog) · R. blairi (Plains Leopard Frog) · R. boylii (Foothill Yellow-Legged Frog) · R. boylii boylii (Foothill Yellow Legged Frog) · R. brownorum (Brown's Leopard Frog) · R. bwana (Rio Chipillico Frog) · R. camerani (Iranian Long-Legged Frog) · R. capito (Carolina Gopher Frog) · R. capito aesopus (Florida Gopher Frog) · R. capito capito (Carolina Gopher Frog) · R. capito sevosa (Dusky Gopher Frog) · R. cascadae (Cascades Frog) · R. catesbeiana (North American Bullfrog) · R. chalconota (Schlegel's Java Frog) · R. chapaensis (Chapa Frog) · R. chensinensis (Asiatic Grass Frog) · R. chiricahuensis (Chiricahua Leopard Frog) · R. clamitans (Bronze Frog) · R. clamitans clamitans (Bronze Frog) · R. clamitans melanota (Northern Green Frog) · R. cubitalis (Siam Frog) · R. daemeli (Australian Wood Frog) · R. dalmatina (Agile Frog) · R. draytonii (California Red-Legged Frog) · R. dunni (Patzcuaro Frog) · R. dybowskii (Dybowski's Frog) · R. emelijanovi (Imeinpo Station Frog) · R. esculenta (Edible Frog) · R. fasciata (Tanganyika Striped Grass Frog) · R. fisheri (Las Vegas Leopard Frog) · R. forreri (Forrer's Grass Frog) · R. galamensis (Galam White-Lipped Frog) · R. glandulosa (Sarawak Frog) · R. graeca (Greek Stream Frog) · R. grylio (Pig Frog) · R. heckscheri (River Frog) · R. hecksheri (River Frog) · R. hejiangensis (Hejiang Frog) · R. holsti (Holst's Frog) · R. holtzi (Taurus Frog) · R. hosii (Mount Dulit Frog) · R. iberica (Iberian Frog) · R. ishikawae (Ishikawa's Frog) · R. italica (Italian Stream Frog) · R. japonica (Japanese Brown Frog) · R. johnsi (John's Groove-Toed Frog) · R. juliani (Maya Mountains Frog) · R. latastei (Italian Agile Frog) · R. lessonae (Pool Frog) · R. livida (Green Cascade Frog) · R. luteiventris (Great Basin Spotted Frog) · R. macrocnemis (Iranian Long-Legged Frog) · R. macroglossa (Guatemala Plateau Frog) · R. maculata (Highland Frog) · R. magnaocularis (Northwest Mexico Leopard Frog) · R. malabarica (Fungoid Frog) · R. maosonensis (Mo-Son Frog) · R. melanomenta (Sulu Frog) · R. montezumae (Montezuma Leopard Frog) · R. muscosa (Southern Mountain Yellow-Legged Frog) · R. narina (Ryukyu Island Frog) · R. neovolcanica (Transverse Volcanic Leopard Frog) · R. nicobariensis (Nicobar Island Frog) · R. nigromaculata (Black-Spotted Pond Frog) · R. nigromaculata nigromaculata (Black-Spotted Pond Frog) · R. nigrovittata (Black-Striped Frog) · R. okaloosae (Florida Bog Frog) · R. okaloossae (Florida Bog Frog) · R. omiltemana (Guerreran Leopard Frog) · R. onca (Relict Leopard Frog) · R. ornativentris (Montane Brown Frog) · R. palmipes (Amazon River Frog) · R. palustris (Pickerel Frog) · R. perezi (Perez's Frog) · R. pipiens (Northern Leopard Frog) · R. pipiens pipiens (Northern Leopard Frog) · R. pleuraden (Yunkwei Plateau Frog) · R. pretiosa (Oregon Spotted Frog) · R. pustulosa (Cascade Frog) · R. pyrenaica (Pyrenean Frog) · R. raniceps (Peters' Malaysian Frog) · R. ridibunda (European Green Frog) · R. rugosa (Wrinkled Frog)
More Info
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Further Reading
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- Amphibian and reptile inventory on the Headwaters and Dillon Resources Areas in conjunction with Red Rock Lakes National Wildlife Refuge / Helena, Mont.: Montana Natural Heritage Program; c1998. url , , , , , , , , , , , .
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Notes
Contributors
- Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 and ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 9, 2012.
- Global Biodiversity Information Facility. Accessed February 29, 2008. http://www.gbif.org Mediated distribution data from 18 providers.
- National Invasive Species Information Center, National Agricultural Library, United States Department of Agriculture. Web Site. Accessed May 3, 2008.
- Santos-Barrera, G. et al. (see rationale for full list of assessors) 2004. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 18, 2008.
Data Sources
Accessed through GBIF Data Portal February 29, 2008:
- Bernice Pauahi Bishop Museum: Bishop Museum Natural History Specimen Data
- Bird Studies Canada: Marsh Monitoring Program - Amphibians
- Borror Laboratory of Bioacoustics
- California Academy of Sciences: CAS Herpetology Collection Catalog
- Canadian Museum of Nature: Canadian Museum of Nature Amphibian and Reptile Collection - Anura
- Carnegie Museums: Amphibians and Reptiles
- EMAN Provider: FrogWatch Canada
- European Environment Agency: EUNIS
- Los Angeles County Museum of Natural History: Vertebrate specimens
- Marine Science Institute, UCSB: Paleobiology Database
- Museum of Comparative Zoology, Harvard University: MCZ Herpetology Collection - Amphibian Database
- Museum of Southwestern Biology, Division of Amphibians and Reptiles: Museum of Southwestern Biology, Division of Amphibians and Reptiles database
- Museum of Vertebrate Zoology: Terrestrial vertebrate specimens
- San Diego Natural History Museum: Herps specimens
- UK National Biodiversity Network: Biological Records Centre - Reptiles and Amphibians Dataset
- UK National Biodiversity Network: Wiltshire and Swindon Biological Records Centre - Amphibian Records for Wiltshire 1900 - 2003
- University of Alberta: University of Alberta Herpetology Collection
- University of Colorado Museum: Zoological specimens
- Yale University Peabody Museum: Peabody Herp Collection DiGIR provider Service
Identifiers
- Biodiversity Heritage Library NamebankID: 26097
- Catalogue of Life Accepted Name Code: ITS-173441
- Global Biodiversity Information Facility Taxonkey: 4490920
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 173441
- IUCN ID: 58565
- Natural Heritage Network Species Identifier: AAABH01070
- Zipcode Zoo Species Identifier: 22
Footnotes
- Mean = 402.840 meters (1,321.654 feet), Standard Deviation = 563.910 based on 547 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
