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USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Big Brown Bat (Eptesicus fuscus) Call
Big Brown Bat (Eptesicus fuscus) Call
USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Big Brown Bat (Eptesicus fuscus) Call

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
California myotis (Myotis californicus) Call
California myotis (Myotis californicus) Call
USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
California myotis (Myotis californicus) Call

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Hoary Bat (Lasiurus cinereus) Echo Call
Hoary Bat (Lasiurus cinereus) Echo Call
USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Hoary Bat (Lasiurus cinereus) Echo Call

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Hoary Bat (Lasiurus cinereus) Social Call
Hoary Bat (Lasiurus cinereus) Social Call
USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Hoary Bat (Lasiurus cinereus) Social Call

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Yuma myotis (Myotis yumanensis) Call
Yuma myotis (Myotis yumanensis) Call
USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)
Yuma myotis (Myotis yumanensis) Call

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

USGS
USGS Visual Identity (USGS logo) - Black (TM)
USGS Visual Identity (USGS logo) - Black (TM)

Bats produce a variety of vocalizations that are used for navigation, feeding, and social communication. Most vocalizations are pitched well above the range of human hearing and are referred to as ultrasonic.

Ashy storm-petrel (Oceanodroma homochroa) with metal identification band being held by a USGS researcher
WERC Researcher Holds Ashy Storm-petrel
WERC Researcher Holds Ashy Storm-petrel
Ashy Storm-Petrel Call
Ashy Storm-Petrel Call
Ashy storm-petrel (Oceanodroma homochroa) with metal identification band being held by a USGS researcher
WERC Researcher Holds Ashy Storm-petrel
WERC Researcher Holds Ashy Storm-petrel
Ashy Storm-Petrel Call

This is the call of the elusive Ashy Storm-Petrel (Oceanodroma homochroa). Ashy Storm-Petrels nest in burrows and crevices on offshore rocks and islands. To avoid predators, they only arrive and depart their island nests under the cover of darkness. That makes studying them pretty difficult.

Ashy storm-petrel (Oceanodroma homochroa) with metal identification band being held by a USGS researcher
WERC Researcher Holds Ashy Storm-petrel
WERC Researcher Holds Ashy Storm-petrel

This is the call of the elusive Ashy Storm-Petrel (Oceanodroma homochroa). Ashy Storm-Petrels nest in burrows and crevices on offshore rocks and islands. To avoid predators, they only arrive and depart their island nests under the cover of darkness. That makes studying them pretty difficult.

Yosemite Toad
Yosemite Toad in Yosemite National Park
Yosemite Toad in Yosemite National Park
Yosemite Toad Vocalization
Yosemite Toad Vocalization
Yosemite Toad
Yosemite Toad in Yosemite National Park
Yosemite Toad in Yosemite National Park
Yosemite Toad Vocalization

Amphibians’ permeable skin makes them incredibly sensitive to changes in their environment. Scientists and conservationists alike are using them as “sentinel species” that could provide early warnings of ecosystem change and stress affecting them and other organisms. Next time you are out, stop and listen. Do you hear them?
 

Yosemite Toad
Yosemite Toad in Yosemite National Park
Yosemite Toad in Yosemite National Park

Amphibians’ permeable skin makes them incredibly sensitive to changes in their environment. Scientists and conservationists alike are using them as “sentinel species” that could provide early warnings of ecosystem change and stress affecting them and other organisms. Next time you are out, stop and listen. Do you hear them?
 

Sierran Treefrog
Sierran Treefrog in Yosemite National Park
Sierran Treefrog in Yosemite National Park
Sierran Treefrog Vocalization
Sierran Treefrog Vocalization
Sierran Treefrog
Sierran Treefrog in Yosemite National Park
Sierran Treefrog in Yosemite National Park
Sierran Treefrog Vocalization

Amphibians’ permeable skin makes them incredibly sensitive to changes in their environment. Scientists and conservationists alike are using them as “sentinel species” that could provide early warnings of ecosystem change and stress affecting them and other organisms. Next time you are out, stop and listen. Do you hear them?
 

Sierran Treefrog
Sierran Treefrog in Yosemite National Park
Sierran Treefrog in Yosemite National Park

Amphibians’ permeable skin makes them incredibly sensitive to changes in their environment. Scientists and conservationists alike are using them as “sentinel species” that could provide early warnings of ecosystem change and stress affecting them and other organisms. Next time you are out, stop and listen. Do you hear them?
 

 California Red-legged Frog
California Red-legged Frog at Point Reyes National Seashore
California Red-legged Frog at Point Reyes National Seashore
California Red-Legged Frog Vocalization
California Red-Legged Frog Vocalization
 California Red-legged Frog
California Red-legged Frog at Point Reyes National Seashore
California Red-legged Frog at Point Reyes National Seashore
California Red-Legged Frog Vocalization

Amphibians’ permeable skin makes them incredibly sensitive to changes in their environment. Scientists and conservationists alike are using them as “sentinel species” that could provide early warnings of ecosystem change and stress affecting them and other organisms. Next time you are out, stop and listen. Do you hear them?
 

 California Red-legged Frog
California Red-legged Frog at Point Reyes National Seashore
California Red-legged Frog at Point Reyes National Seashore

Amphibians’ permeable skin makes them incredibly sensitive to changes in their environment. Scientists and conservationists alike are using them as “sentinel species” that could provide early warnings of ecosystem change and stress affecting them and other organisms. Next time you are out, stop and listen. Do you hear them?
 

Forster Tern standing
Forster Tern
Forster Tern
Forster's Tern Attraction Tape
Forster's Tern Attraction Tape
Forster Tern standing
Forster Tern
Forster Tern
Forster's Tern Attraction Tape

A sample of the audio file of Forster's tern colony calls that will be broadcast to attract breeding terns to islands in south San Francisco Bay.

A sample of the audio file of Forster's tern colony calls that will be broadcast to attract breeding terns to islands in south San Francisco Bay.

USGS
USGS Visual Identity - Black (TM)
USGS Visual Identity - Black (TM)
SneakPeek: USGS Public Lecture, Can Our Western Forests Take the Heat?
SneakPeek: USGS Public Lecture, Can Our Western Forests Take the Heat?
USGS
USGS Visual Identity - Black (TM)
USGS Visual Identity - Black (TM)
SneakPeek: USGS Public Lecture, Can Our Western Forests Take the Heat?
  • Tree death rates have more than doubled over the last few decades in old-growth forests of our western states, possibly reflecting increasing temperatures, with potentially serious consequences for wildlife, fire risks, and the global carbon cycle
  • Tree death rates have more than doubled over the last few decades in old-growth forests of our western states, possibly reflecting increasing temperatures, with potentially serious consequences for wildlife, fire risks, and the global carbon cycle
USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
What You Otter Know About Sea Otters - Part 3
What You Otter Know About Sea Otters - Part 3
USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
What You Otter Know About Sea Otters - Part 3

The last week in September is known as Sea Otter Awareness Week throughout California. To bring more attention to the issues surrounding the sea otter and its ongoing recovery from near extinction, we interviewed Tim Tinker, USGS lead sea-otter researcher. Video also provided in the Transcript/Links section.

The last week in September is known as Sea Otter Awareness Week throughout California. To bring more attention to the issues surrounding the sea otter and its ongoing recovery from near extinction, we interviewed Tim Tinker, USGS lead sea-otter researcher. Video also provided in the Transcript/Links section.

USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
What You Otter Know About Sea Otters - Part 2
What You Otter Know About Sea Otters - Part 2
USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
What You Otter Know About Sea Otters - Part 2

The last week in September is known as Sea Otter Awareness Week throughout California. To bring more attention to the issues surrounding the sea otter and its ongoing recovery from near extinction, we interviewed Tim Tinker, USGS lead sea-otter researcher. Video also provided in the Transcript/Links section.

The last week in September is known as Sea Otter Awareness Week throughout California. To bring more attention to the issues surrounding the sea otter and its ongoing recovery from near extinction, we interviewed Tim Tinker, USGS lead sea-otter researcher. Video also provided in the Transcript/Links section.

USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
What You Otter Know About Sea Otters - Part 1
What You Otter Know About Sea Otters - Part 1
USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
What You Otter Know About Sea Otters - Part 1

The last week in September is known as Sea Otter Awareness Week throughout California. To bring more attention to the issues surrounding the sea otter and its ongoing recovery from near extinction, we interviewed Tim Tinker, USGS lead sea-otter researcher. Video also provided in the Transcript/Links section.

The last week in September is known as Sea Otter Awareness Week throughout California. To bring more attention to the issues surrounding the sea otter and its ongoing recovery from near extinction, we interviewed Tim Tinker, USGS lead sea-otter researcher. Video also provided in the Transcript/Links section.

USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
Wildfire Woes for Things That Swim, Hop, Crawl, and Eat a Lot
Wildfire Woes for Things That Swim, Hop, Crawl, and Eat a Lot
USGS CoreCast
USGS CoreCast Series
USGS CoreCast Series
Wildfire Woes for Things That Swim, Hop, Crawl, and Eat a Lot

Biologist Robert Fisher tells a troubling tale of how wildfire in Southern California has disrupted the lives of frogs, shrews, fish, and salamanders (despite the latter's mythical fondness of flame).

Biologist Robert Fisher tells a troubling tale of how wildfire in Southern California has disrupted the lives of frogs, shrews, fish, and salamanders (despite the latter's mythical fondness of flame).

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