Special-Status Plant Species That May Be Found In Bidwell Park
Common Name
Scientific Name
Listing Blooming Period Photo
Habitat Associations Known / Expected
List 1B = plants that are rare, threatened, or endangered in California and elsewhere;
List 2 = plants that are rare and endangered in California, but more common elsewhere;
List 3= plants about which we need more information — A review list;
List 4 = plants of limited distribution — a watch list;
CE = California Endangered;
FE = Federally endangered;
Ahart’s paronychia
Paronychia ahartii
1B March-June Photo of Paronychia ahartii Vernal pools, shallow or poorly drained soil in Cismontane woodland, valley and foothill grassland, elevation 30-510 meters
Awl-leaved navarretia
Navarretia subuligera
4 April-August Photo of Navarretia subuligera Rocky mesic sites in chaparral, cismontane woodland, lower montane coniferous forest; elevation 150-1100 meters
Bidwell’s knotweed
Polygonum bidwelliae
4 April-July Photo of Polygonum bidwelliae Thin, rocky volcanic soils in chaparral, cismontane woodland, valley and foothill grassland; elevation 60-1200 meters Known
Brownish beaked-rush
Rhynchospora capitellata
2 July-August Photo of Rhynchospora capitellata Meadows and seeps in lower montane coniferous forest and valley and foothill grassland, volcanic or serpentine; elevation 215-945 meters
Butte County calycadenia
Calycadenia oppositifolia
1B April-July Photo of Calycadenia oppositifolia Grassy slopes, openings in shrubs and road cuts in chaparral, cismontane woodland, lower montane coniferous forest and valley and foothill grassland, volcanic or serpentine; elevation 215-945 meters Known
Butte County checkerbloom
Sidalcea robusta
1B April-June Photo of Sidalcea robusta Chaparral, cismontane woodland, sometimes along rock ledges, small drainages and under drip lines of trees or shrubs; elevation 90-1699 meters Known
Butte County fritillary
Fritillaria eastwoodiae
3 March-May Photo of Fritillaria eastwoodiae Chaparral, cismontane woodland, lower montane coniferous forest (openings) / sometimes serpentine; elevation 50-1500 meters
Butte County meadowfoam
Limnanthes floccosa ssp. californica
1B/CE/FE March-May Photo of Limnanthes floccosa ssp. californica Vernal pools and swales in valley and foothill annual grassland; elevation 50-930 meters
Butte County morning-glory
Calystegia atriplicifolia ssp. buttensis
1B May-July Photo of Calystegia atriplicifolia ssp. buttensis Lower montane coniferous forest; elevation 600-1200 meters
California beaked-rush
Rhynchospora californica
1B May-July Photo of Rhynchospora californica Bogs and fens, lower montane coniferous forest, meadows and seeps, marshes and swamps (freshwater) elevation 45-1010 meters Known
California Hibiscus
Hibiscus lasiocarpus
2 Mid Jun&emdash;Sep. Photo of Hibiscus lasiocarpus Sloughs, stream banks, irrigation ditches, seeps. Known
Depauperate milk-vetch
Astragalus pauperculus
4 March-June Photo of Astragalus pauperculus Chaparral, cismontane woodland, valley and foothill grassland / vernally mesic, volcanic; elevation 60-855 meters Known
Henderson’s bent grass
Agrostis hendersonii
3 April-May Valley and foothill grassland (mesic), vernal pools; elevation 70-305 meters
Humboldt lily
Lilium humboldtii ssp. humboldtii
4 Early Jun&emdash;Jul. Photo of Lilium humboldtii ssp. humboldtii Dry forest floor, dry brushy slopes. Known
Little spike-rush
Eleocharis parvula
3 Photo of Eleocharis parvula Wet mud flats of streams, ponds, seasonal marshes. Known
Red Bluff Dwarf Rush
Juncus leiospermus var. leiospermus
1B March-May Photo of Juncus leiospermus var. leiospermus Vernal pools and swales, seeps and other seasonally moist sites in chaparral, cismontane woodland, valley and foothill grassland; elevation 35-1020 meters
Rose mallow
Hibiscus lasiocarpus
2 June-September Photo of Hibiscus lasiocarpus Marshes and swamps (freshwater); elevation 0-120 meters Known
Round-leaved filaree
Erodium macrophyllum
2 March-May Photo of Erodium macrophyllum Cismontane woodland, valley and foothill grassland / clay; elevation 15-1200 meters
Sanborn’s onion
Allium sanbornii var. sanbornii
4 Mid Jul&emdash;Aug. Photo of Allium sanbornii var. sanbornii Volcanic outcrops Known
Shield-bracted monkeyflower
Mimulus glaucescens
4 February-August Photo of Mimulus glaucescens Chaparral, cismontane woodland, lower montane coniferous forest, valley and foothill grassland / serpentine seeps; elevation 60-1240 meters Known
Tehama navarretia
Navarretia heterandra
4 April-June Photo of Navarretia heterandra Valley and foothill grassland (mesic), vernal pools; elevation 30-95 meters Known
Thread-leaved beakseed
Bulbostylis capillaris
4 June-August Photo of Bulbostylis capillaris Lower montane coniferous forest, meadows and seeps, upper montane coniferous forest; elevation 395-2075 meters
White-stemmed clarkia
Clarkia gracilis ssp. albacaulis
1B May-July Photo of Clarkia gracilis ssp. albacaulis Chaparral, cismontane woodland, sometimes serpentine; elevation 245-1085 meters Known
Woolly meadowfoam
Limnanthes floccosa ssp. floccosa
4 March-June Photo of Limnanthes floccosa ssp. floccosa Chaparral, cismontane woodland, valley and foothill grassland, vernal pools / vernally mesic; elevation 60-1095 meters Known


Special-Status Wildlife Species That May Be Found In Bidwell Park
Common Name
Scientific Name
Listing Habitat Associations Known / Expected
CSC = California Species of Concern;
FSC = Federal Species of Concern;
CE = California Endangered;
CT = California Threatened;
FE = Federally endangered;
FP = Fully Protected;
FT = Federally Threatened;
FCL = Federal Candidate for Listing

Amphibians and Reptiles

California horned lizard
Phrynosoma coronatum
FP/FSC Associated with a variety of woodland and shrubland habitats, usually in areas with sandy to gravelly substrates; need loose soil, rodent burrows or other debris for cover
California red-legged frog
Rana aurora draytonii
SC/FT Still or slow moving water in intermittent or permanent streams and ponds
California whipsnake
Masticophis lateralis
CL Scrublands with open grassy and rocky areas, gullies, canyons and stream courses; seeks shelter in burrows or among rocks
California whiptail
Cnemidophorus tigris
CL Usually in open arid habitats where vegetation is sparse, can be found in stream courses and openings in woodland and forests as well; Known
Foothill yellow-legged frog
Rana boylii
C Mainly associated with perennial streams, although can be found in other types of water bodies as well, including backwaters, isolated pools, ponds and marshes Known
Giant garter snake
Thamnophis gigas
T/FT Associated with emergent vegetation in marshes, sloughs, ponds, streams, ditches and rice fields
Western pond turtle
Clemmys marmorata
C/SC Associated with permanent water sources possessing suitable basking sites. Nests in adjacent upland habitats Known
Western skink
Eumeces skiltonianus
CL. A variety of forest, shrubland and grassland habitats, where it frequents the underside of logs and rocks; often near streams or other water, although can be found in more arid areas as well Known
Western spadefoot toad
Scaphiopus hammondii
SC/FSC Breeds in seasonal rain pools, or pools in seasonal creeks; dry period spent in burrows, often those of rodents


American kestrel
Falco sparverius
P Breeds in open or partly open habitats, agricultural and urban areas; nest in tree cavities; feeds on small invertebrates and small mammals; pairs monogamous Known
American peregrine falcon
Falco peregrinus anatum
E/FP Breeds in open habitats where it nest on cliff edges, rarely trees and cavities; Cliff sites used traditionally for many years; feeds on birds; pairs monogamous Known
Bald eagle
Haliaeetus leucocephalus
E/FT Nests and roosts in large trees with open branches, usually within one-mile of open water bodies Known
Burrowing owl
Athene cunicularia
SC/FSC Nests in suitable rodent burrows in open areas in valley and foothill annual grassland and some woodland communities
California horned lark
Eremophila alpestris actia
SC The California horned lark (Eremophila alpestris) is a migrant bird from South America. There are 21 subspecies of horned lark within its range and the California horned lark is one of 8 subspecies that breed in California. The California horned lark prefer open terrain where they construct nests on the ground, often in sparsely vegetated areas. Highest nesting densities are generally found in annual grassland and oak savannah habitats in the foothill regions.
Cooper’s hawk
Accipiter cooperii
SC Nests and forages in dense riparian and oak woodland habitats that are usually near water Known
Ferruginous hawk
Buteo regalis
SC/FSC Resident and migrant in low elevation areas of California; inhabits open grassland, desert scrub and open savannah habitats; nests in isolated trees, snags or poles
Golden Eagle
Aquila chrysaetos
SC/FP Breeds in open habitats, nest in trees and on ledges; nest can become very large; feeds n mammals, birds, reptiles insects and carrion, pairs monogamous Known
Grasshopper sparrow
Amodramus savannarum
SC Occupies open areas in grasslands, old fields and some scrub habitat types where it feeds and nests on the ground; somewhat secretive
Great horned owl
Bubo virginianus
P Breeds in variety of habitat types; uses abandoned nest in trees, cavities, caves, stumps and on the ground. Feeds on small mammals, birds and insects Known
Loggerhead shrike
Lanius ludovicianus
SC/FSC Inhabits grassland, savannah and open-canopy woodland habitats throughout low-elevation California Known
Northern harrier
Circus cyaneus
nbsp; Northern harriers, also known as marsh hawks, occur in California throughout the Great Central Valley, the central and north Coast Ranges, and the Great Basin and Modoc Plateau region of northeastern California. This species prefers to nest on the ground concealed in thick marsh or grassland vegetation, near open foraging areas. Northern harriers will also nest in somewhat disturbed habitats such as the margins of farm fields, pastures, irrigation ditches and levee banks. Loss of riparian, marsh and grassland habitats have contributed to the historical decline of this species. Known
Northern Saw-whet owl
Aegolius acadiicus
P Breeds in dense conifer and mixed conifer forest; uses abandoned woodpecker holes and natural cavities; feeds on rodents, birds and insects Known
Oak titmouse
Baeolophus inornatus
SC Nests and roosts in tree or snag cavities in oak woodland and savannah Known
Prairie falcon
Falco mexicanus
P Nest on cliff ledges and rock crevices which face open areas; feeds on birds, small mammals, insects, and lizards; pairs monogamous
Purple martin
Progne subis
SC Breeds in riparian woodlands from April-Aug; uncommon summer resident; Introduced House Sparrows and European Starlings compete for suitable habitat
Red-tailed hawk
Buteo jamaicensis
P/FP Breeds in woodlands and savannas; usually nest in tall trees. Eats mostly rodents but also insects, birds, reptiles, amphibians, crayfish and fish Known
Sharp-shinned hawk
Accipiter striatus
SC/FP In California, this species breeds primarily in conifer forests in the Sierra Nevada, the coastal forests of northern California, and in small numbers in the mountain ranges of southern California. Sharp-shinned hawks winter throughout the state. Sharp-shinned hawks typically nest in dense, relatively young even-aged conifer stands and in deciduous riparian habitats. Nests are usually situated on moderately steep north-facing slopes, near water in stands with a high foliage density and often near forest openings or edges. Known
Short-eared owl
Asio flammeus
SC/FSC Open grassland, meadows, irrigated agricultural pastures; nests in riparian habitat
Swainson’s hawk
Buteo swainsoni
T Resident and migrant of California’s Central Valley; requires large trees in riparian woodland or oak savannah; forages in adjacent grasslands and agricultural fields
Turkey Vulture
Cathartes aura
P/FP Breeds in open habitats in lowlands and mountains; lay eggs in caves, on rock crevices and occasionally in stumps; feeds on carrion; pairs monogamous Known
Western yellow-billed cuckoo
Coccyzus americanus occidentalis
E Breeds in well-developed riparian woodland habitats, usually in river bottoms
White-tailed kite
Elanus leucurus
FP Inhabits a variety of open grassland and woodland habitats and agricultural areas; nests in relatively well-developed woodlands Known
Yellow breasted chat
Icteria virens
SC Breeds in riparian woodlands May-Aug.; Uncommon summer resident; parasitism by Brown Headed Cowbirds prevalent Known
Yellow warbler
Dendroica petechia
SC Breeds in riparian woodlands April-Aug; uncommon summer resident Known


Northern California steelhead trout
Oncorhynchus mykiss
T/FT Anadromous subspecies of rainbow trout; Adults enter Central Valley tributaries in Fall and spawn through winter after which they return to the Pacific Ocean. Juvenile steelhead spends one to three years in fresh water before migrating to the Pacific Ocean.
River lamprey
Lampetra ayresi
SC Migrates from the upper Sacramento River into smaller perennial tributary streams to spawn in the winter and spring months. Although they spawn in clean gravels, the ammocoetes (larveae) remain buried in silt and sand of backwaters and eddies. In this habitat, these juveniles feed on algae and microbes. After staying 3-5 years in the tributaries, the young eels migrate to the Sacramento River and then out to the ocean. Known
Spring-run Chinook salmon
Oncorhynchus tshawytscha
T/FT The spring-run enters the creek from March through July. The spring-run migrates up to the higher reaches where they spend the summer and spawn the following fall. Critical for the spring-run, are the year-round, cold, deep, and protected pools that harbor adults through the summer months, until fall and winter spawning occurs. Critical to successful spawning are cold, clean, oxygenated, silt-free gravel beds. Known


Conservancy fairy shrimp
Branchinecta conservatio
E Vernal pools
Valley elderberry longhorn beetle
Desmocerus californicus dimorphus
T Associate of riparian woodland and shrubland habitats where sole host plant for larva is the blue elderberry bush (Sambucus mexicanus); questions surround the taxonomic circumscription of this entity Known
Vernal pool fairy shrimp
Branchinecta lynchi
T Vernal pools
Vernal pool tadpole shrimp
Agrostis hendersonii
E Vernal pools


Taxidea taxus
SC Inhabits foothills and mountain meadows where it feeds on ground squirrels, rats, mice, gophers and chipmunks. Lives in burrows.
Black-tailed hare
Lepus californicus
SC Eats a variety of plants, considered a pest on farms Known
Fringed myotis bat
Myotis thysanodes
SC/FSC Occurs in a variety of grassland, woodland and forest habitats; forages over open water, pastures, grasslands and other open areas; may roost in caves, crevices, hollows in trees or snags
Long-eared myotis bat
Myotis evotis
SC/FSC Occurs in a variety of habitats, although it prefers woodland and forested areas; forages among trees, over open water, and over shrubs; may roost in caves, crevices, hollows in trees or snags
Long-legged myotis
Myotis volans
SC Usually associated with forest and woodlands over 4,000 feet elevation, although this species is also known from lower elevations in chaparral and coastal scrub communities; roosts in caves, crevices, hollows in trees or snags, buildings and under tree bark
Marysville Heerman’s kangaroo rat
Dipidomys californicus eximius
SC/FSC Annual grassland, coastal scrub, chaparral and woodlands; burrows in well-drained soils, sometimes using abandoned burrows
Mountain Lion
Felis concolor
T Lions generally make dens in caves or cervices of rockslides along base of cliffs; feed primarily on deer Known
Bassaricus astutus
T Ringtails are found in riparian forests, chaparral, shrub-fields, oak woodlands, and rocky hillsides. Ringtails feed primarily on rodents although insects, birds and fruit are also consumed when available. They are mostly nocturnal and live and reproduce in a variety of den types, including hollow trees, rock outcrops, brushy areas, and underground burrows. Loss of riparian forest and other suitable habitats has caused declines in populations and local extirpations. Known
Small-footed myotis bat
Myotis ciliolabrum
CS Occupies a variety of arid upland habitats, usually associated with wooded or brushy areas; roosts in caves, buildings, crevices and sometimes on rough bark
Townsend’s big-eared bat
Corynorhinus pallescens
SC/FSC Typically associated with riparian habitats; roosts in caves, hollow trees, buildings, bridge overpasses, mines and other man-made structures
Vagrant shrew
Sorex vagrans
CL Feeds on insects, spiders, snails, and earthworms; seldom lived beyond 18 months; do not hibernate Known
Yuma myotis bat
Myotis yumanensis
SC Forages over open water in open forests and woodlands; roosts in buildings, caves, crevices or mines