Originally released in 1958 on LP by Folkways, US

元々1958年にフォークウェイズ・レコーズからリリースされた本作は、北米のカエルの鳴き声を集めたフィールド・レコーディングの名作。1998年にCD化された際、大型CDショップのニューエイジ売り場にて大きく展開された作品です。人気の秘密はそのボリューム。カエルの鳴き声を集めたCDは他にも幾つかあっても、57種類の鳴き声を集めたという本作のヴァラエティに勝るものはありません。同系統の多くのCDが１トラック60分であったり、数分のトラックを10数個集めたものだったりする中、本作は怒濤の92トラック。殆どのトラックが１分以下で、各種の鳴き声の違いを存分に楽しめるようになっています。勿論、サンプリングやSE等の使い勝手も良い訳です。
本作はアメリカ自然史博物館の生物学者チャールズ・M・ボガートによって録音されました。40頁以上に及ぶ解説、またナレーションも彼が担当しています。当然、生物学的資料として貴重なものであり、知的欲求も満たしてくれますが、なによりアピールしたいのは収録されたカエルの鳴き声自体の、多様で不思議なサウンド。日本に住む私たちにも馴染み深い声から、小鳥か子犬かというような可愛らしい声、特撮映画の怪獣の鳴き声のようなもの、更にはエフェクトをかけたエレキ・ギターのノイズにしか聴こえないようなものまで、本当に様々な鳴き声が収録されています。近年急速な個体数の減少が危惧されている両生類だけに、中にはもう聴くことの出来ない、失われた声もあるかもしれません。
カエル好きの方（？）には勿論マスト・アイテムですが、あらゆる「未知の音」を求める音楽ファンにこそ聴いて驚いてほしい作品です。（サプライヤーインフォより）

Concept, Narrator, Field Recordings by Charles M. Bogert

1 Individual Barking Treefrog, Hyla Gratiosa, Recorded In Soundproofed Room At Archbold Biological Station, Highlands County, Florida; Individual Taken Four Miles South Of The Station At 9:45 P.M. On The Evening Of July 16, 1957 0:16
2 Chorus Of Barking Treefrogs, Hylya Gratiosa, Recorded Four And A Half Miles South Of Archbold Station, Highlands County, Florida, Between 8:45 And 9:05 P.M. On The Evening Of July 16, 1957 0:20
3 Mixed Chorus Recorded One-Half Mile South Of Archbold Biological Station, Highlands County, Florida, At 10:15 P.M. On July 7, 1954 0:50
4 The Southern Toad, Bufo Terrestris, Recorded At 8:10 P.M. On August 21, 1954, At East Lake, Putnam County, Florida 0:38
5 The Green Treefrog, Hlya Cinerea, Recorded At Orange Springs, Marion County, Florida, At 8:45 P.M., August 29, 1954, With The Flow Of Water From The Springs In The Background 0:18
6 A Continuation Of The Same Call Heard In No. 5, The Call Terminating In The Accelerated, Less Musical Sounds Most Often Heard When These Frogs Are Calling Singly Or In Small Choruses 0:36
7 Chorus Of Eastern Narrow-Mouthed Toads, Gastrophryne Carolinensis, Recorded At 10:55 P.M. On May 30, 1954, Seven Miles South Of The Archbold Biological Station In Highlands County, Florida 1:07
8 Voice Of Acris Gryllus Dorsalis, Recorded At East Lake, Putnam County, Florida, At 1:45 A.M. On August 20, 1954 0:21
9 Mating Call Of Squirrel Treefrog, Hyla Squirella, Recorded At 11:45 P.M. On July 25, 1957, Near Englewood, Sarasota County, Florida 0:24
10 Mating Call Of The Pine Woods Treefrog, Hyla Femoralis, Recorded Two Miles North Of Orange Springs, In Putnam County, Florida, On The Evening Of August 23, 1954 0:25
11 Chorus Of Green Treefrogs, Hyla Cinerea, Recorded At 9:50 P.M. In A Swampy Area Adjacent To The Oklawaha River, East Of Silver Springs, Marion County, Florida 0:23
12 Barking Treefrog, Hyla Gratiosa, Taken At 10:05 P.M. Four And A Half Miles South Of The Archbold Biological Station And Recorded The Same Evening In The Laboratory At The Station On July 16, 1957 0:34
13 Mating Call Of The Pig Frog, Rana Grylio, With Cricket Frogs, Acris Gryllus Dorsalis, In The Background, Recorded At 9:05 P.M. On May 31, 1954, Four Miles North Of The Archbold Biological Station, Highlands County, Florida 0:32
14 Breeding Chorus Of Southern Leopard Frogs, Rana Utricularia, Recorded At 1:00 A.M., East Of Hicoria In Highlands County, Florida, With Cricket Frogs, Acris Gryllis Dorsalis, In The Background 0:40
15 A Large Breeding Chorus Of Florida Gopher Frogs, Rana Capito, With One Barking Treefrog, Hyla Gratiosa, And The Pine Woods Treefrog, Hyla Femoralis, As Well As Cricket Frogs, Acris Gryllus Darsalis, In The Background 0:54
16 Mating Trill Of The Southern, Bufo Terrestris, Recorded At 7:05 P.M., On May 25, 1954, At Tarpon Lake, Collier County, Florida 0:39
17 Breeding Call Of The Oak Toad, Bufo Quercicus, With The Squirrel Treefrog, Hyla Squirella, In The Background 0:25
18 Mating Call Of Hybrid Treefrog, Evidently The Result Of The Cross-Mating Of The Barking Treefrog, Hyla Gratiosa, And The Green Treefrog, Hyla Cinerea 0:47
19 Green Treefrog, Hyla Cinerea, Recorded In The Laboratory On July 17, 1957 0:16
20 The Mating Call Of The Barking Treefrog Is Heard First, Finally Joined By The Hybrid Treefrog, Hyla Cinera X Hyla Gratiosa, After Both Species Were Induced To Call In The Laboratory After Their Capture On The Evening Of July 15, 1957, By Allowing Them To Listen To A Recording Of Their Own Chorus Through The Earphones Of A Portable Tape Recorder 0:26
21 Mating Call Of The Red-Spotted Toad, Bufo Punctatus, Recorded At An Elevation Of 5,000 Feet In Cave Creek, Chiricahua Mountains, Arizona On The Evening Of July 3, 1953, Between 10:30 And 11:00 P.M. 0:36
22 The Somewhat Distinctive Call Of An Individual Red-Spotted Toad, Bufo Punctatus, Recorded At The AVA Ranch, Portal, Cochise County, Arizona, At 8:15 On The Evening Of July 10, 1955 0:32
23 Mating Call Of Fowler’s Toad, Bufo Woodhousei Fowleri, Recorded One Mile East Of Little Rock, Arkansas, At 8:45 On The Evening Of April 20, 1955 0:22
24 Mating Call Of Fowler’s Toad, Recorded One-Half Mile West Of Henderson, North Carolina, At 11:00 P.M. On May 17, 1954 0:28
25 Mating Call Of The Southwestern Woodhouse’s Toad, Bufo W. Australis, Recorded On The Outskirts Of Phoenix, Arizona, On The Evening Of April 24, 1955 0:21
26 Mating Call Of The American Toad, Bufo Americanus, Recorded At 10:45 P.M. On April 30, 1957, One-Fourth Mile South Of Monett, Missouri 0:51
27 Mating Call Of The Southern Toad, Bufo Terrestris, Recorded At East Lake, Putnam County, Florida, At 7:45 P.M., August 20, 1954 0:41
28 Mating Call Of The Eastern Gray Treefrog, Hyla Versicolor, With The Single Note Or “Territoriality” Call Of The Green Frog, Rana Clamitans Melonata, In The Background 0:30
29 Mating Call Of The Gray Treefrog, Hyla Chrysoscelis, Recorded One-Half Mile West Of Henderson, North Carolina, At 10:15 P.M., May 17, 1954 0:37
30 Mating Call Of The Gray Treefrog, Hyla Chrysoscelis, Recorded Near The Oklawaha River, Putnam County, Florida, At 10:15 P.M. On September 1, 1954 0:32
31 Mating Call Of The Gray Treefrog, Hyla Chrysoscelis, Recorded Two Miles South Of Monett, Missouri, On The Evening Of April 30, 1957 0:23
32 Mating Call Of The Canyon Treefrog, Hyla Arenicolor, Recorded At The Painted Canyon Ranch, Cave Creek, Cochise County, Arizona, At 8:30 P.M. On July 8, 1953 0:31
33 Mating Call Of The California Treefrog, Hyla Cadaverina, Recorded In Sentenac Canyon, San Diego County, California, With The Pacific Treefrog, Hyla Regilla, Heard In The Background 1:01
34 Warning Croak Accompanied By “Warning Vibration” Of The Southern Toad, Bufo Terrestris, Recorded At East Lake, Putnam County, Florida, On August 20, 1954 0:54
35 Warning Chirp Of Boreal Toad, Bufo Boreas Boreas, Without Any Warning Vibration Apparent 0:31
36 Warning Croak Of The Sonoran Desert Toad, Bufo Alvarius, Recorded At Wickenburg, Arizona, The Day After The Toad Was Collected On April 24, 1955, Near Phoenix, Arizona 0:28
37 Warning Chirp Of The California Treefrog, Hyla Cadaverina, Recorded In Andreas Canyson, Riverside County, California, On The Afternoon Of March 26, 1956 0:31
38 Warning Croak Of The Florida Gopher Frog, Rana Capito, Recorded On July 7, 1954, In The Laboratory At The Archbold Biological Station, With A Specimen Taken One-Fourth Mile South Of The Station 0:55
39 The “Territoriality Call” Of The Southern Race (The Bronze Frog, Rana C. Clamitans) Of The Green Frog 0:27
40 “Rain Song” Of The Squirrel Treefrog, Hyla Squirella, Recorded At Tarpon Lake, Collier County, Florida, On The Afternoon Of May 27, 1954 1:01
41 Scream Of The Southern Leopard Frog, Rana Utricularia, From A Specimen Taken At The Archbold Biological Station And Recorded In The Laboratory, Where It Was Simply Seized In The Hand 0:49
42 Chorus Of Pig Frogs, Rana Grylio, Recorded Two Miles North Of The Archbold Biological Station On The Evening Of May 31, 1954 0:57
43 The Grunt-Like Sound Produced By The Pig Frog, Rana Grylio, With The Rasping Voice Of Barred Owl And Cricket Frogs In The Background 0:17
44 The Voice Of The Pig Frog, Rana Grylio, That Corresponds To The Scream Of The Leopard Frog 0:39
45 The Mating Call Of The Bullfrog, Rana Catesbeiana, With Cricket Frogs, Acris G. Gryllus, In The Background 0:33
46 The Mating Call Of The Pig Frog, Rana Grylio, Recorded Four Miles North Of The Archbold Biological Station At 9:15 P.M. On May 31, 1954 0:32
47 Mating Chorus Of Southern Leopard Frogs, Rana Utricularia, Near Hicoria, Highlands County, Florida, With Crickets Frogs, Acris Gryllus Dorsalis 0:34
48 Mating Call Of The Pickerel Frog, Rana Palustris, With The Territorality Call Of The Green Frog, Rana Clamitans Melanota, Heard In The Background 0:29
49 Mating Call Of The Giant Toad, Bufo Marinus, Recorded On Barro Colorado Island In The Canal Zone
Recorded By – Peter Paul Kellogg
0:43
50 Mating Call Of The Sonoran Desert Toad, Bufo Alvarius, With The New Mexico Spadefoot, Scaphioupus Mulitplicatus, And Couch’s Spadefoot, Scaphiopus Couchi, In The Background 0:39
51 Mating Call Of The Gulf Coast Toad, Bufo Valliceps, With Other Toads Of The Same Species To Be Heard In The Background 0:48
52 Mating Call Of The Arroyo Toad, Bufo Microscaphus Californicus, Recorded In The Evening Near The Mojave River, Near Victorville, California, April 1954
Recorded By – Robert C. Stebbins
0:41
53 Mating Call Of Red-Spotted Toad, Bufo Punctatus, Recorded At 11:10 P.M. On April 22, 1957 Near Austin, Texas 0:45
54 Mating Call Of The Green Toad, Bufo Debilis Insidior, Recorded Ten Miles North Of Rodeo, New Mexico, At 9:55 P.M. On July 17, 1955 0:42
55 Mating Call Of The Oak Toad, Bufo Quercicus, Recorded Near Placida, Florida, At 2:50 A.M. On July 27, 1957 0:27
56 The Call Of The Green Toad, Bufo Debilis Insidior, Recorded Ten Miles North Of Rodeo, New Mexico, On The Evening Of July 17, 1955 0:34
57 This Is The Same Call Heard In The Previous Recording But Reduced To One-Quarter Speed 0:40
58 The Mating Chorus Of The Eastern Narrow-Mouthed Toad, Gastrophryne Carolinesis, Recorded Near The Oklawaha River, East Of Orange Springs, Marion County, Florida, At 10:20 P.M. On September 1, 1954 0:33
59 The Mating Call Of The Great Plains Narrow-Mouthed Toad, Gastophryne Olivacea, Recorded At Alamos, Sonora, Mexico, On The Evening Of August 20, 1955 0:30
60 Mating Chorus Of The Plains Spadefoot, Scaphiopus Bombifrons, With A Duet Discernible In The Foreground 0:41
61 Chorus Of The Lowland Burrowing Treefrog, Pternohyla Fodiens, Recorded 13 Miles West Of Hermosillo, Sonora, Mexico, On The Evening Of July 30, 1955 0:27
62 Mating Call Of The Pine Barrens Treefrog, Hyla Andersoni, With A “Reply” Of Another Frog Of The Same Species In The Background 0:27
63 Mating Call Of The Mountain Treefrog, Hyla Eximia, Recorded One Mile South Of Tepic, Nayarit, Mexico, On The Evening Of August 16, 1956 0:36
64 Mating Call Of The Mexican Treefrog, Smilisca Baudini, Joined By The Mexican Burrowing Frog, Pternohyla Fodiens, Recorded 25 Miles South Of Culiancán, Sinaloa, Mexico, On The Evening Of September 9, 1957 0:35
65 Mating Call Of The Spring Peeper, Hyla Crucifer, Recorded At The Eastern Edge Of Tenafly, New Jersey, At 7:15 P.M. On April 18, 1957 0:23
66 Mating Chorus Of The Pacific Treefrog, Hyla Regilla, In Littlerock Creek, Littlerock, Los Angeles County, California, On The Edge Of The Mojave Desert At 10:20 P.M. On April 30, 1955 0:34
67 The Mating Call Of The Dwarf Mexican Treefrog, Hyla Smithi, Recorded Four Miles East Of Tepic, Nayarit, Mexico, On The Evening Of September 1, 1957 0:33
68 Mating Call Of The Little Grass Frog, Pseudocris Ocularis, With The Squirrel Treefrog, Hyla Squirella, In The Background 0:17
69 Western Chorus Frog, Pseudacris Triseriata, Recorded Two Miles South Of Monett, Missouri, At 9:05 P.M. On April 30, 1957 0:24
70 Blanchard’s Cricket Frog, Acris Gryllus Blanchardi, With The Southern Leopard Frog, Rana Urticularia, In The Background 0:28
71 The Florida Cricket Frog, Acris Gryllus Dorsalis, Recorded At East Lake, Putnam County, Florida, On Afternoon Of August 20, 1954 0:16
72 Mexican Leaf Frog, Pachymedusa Dacnicolor, Recorded Near Acapulco, Guerrero, Mexico, On The Evening Of August 12, 1956 0:26
73 Mating Call Of Couch’s Spadefoot, Scaphiopus Couchi, Recorded Nine Miles North Of Rodeo, New Mexico, At 9:40 P.M. On July 17, 1955 0:35
74 Mating Call Of The Plains Spadefoot, Scaphiopus Bombifrons, A Single Individual Calling From A Pond On The Afternoon Of July 13, 1955 0:19
75 Mating Chorus Of The New Mexico Spadefoot, Scaphiopus Multiplicatus, Recorded Seven Miles West Of San Antonio De Las Alazanas, Coahuila, Mexico, On The Evening Of June 21, 1957, At 9:30 P.M. 0:32
76 Mating Chorus Of Three Species Of Spadefoot, With The New Mexico Spadefoot, Scaphiopus Multiplicatus, Predominating 0:37
77 Mating Call Of The Great Basin Spadefoot, Scaphiopus Intermontanus, Recorded In Sacajewa State Park Near Pasco, Franklin County, Washington, In July 1954
Recorded By – Robert C. Stebbins
0:30
78 Mating Call Of The Sabinal Frog, Leptodactylus Melanonotus, With Smilisca Baudini Heard In The Background 0:31
79 Mating Chorus Of The Great Plains Toad, Bufo Cognatus, Recorded Three Miles East Of The Cienega Ranch, In Hidalgo County, New Mexico At 9:17 P.M. On July, 1953 0:28
80 Mating Call Of The Yosemite Toad, Bufo Canorus, Recorded 2 Miles Northeast Of The Kaiser Pass Summi, Fresno County, California, Between 1:00 And 2:00 P.M. On The Afternoon Of June 8, 1954
Recorded By – Ernest L. Karlstrom
0:33
81 Mating Call Of The Sonoran Green Toad, Bufo Retiformis, Recorded Seven Miles South Of Hermosillo, Sonora, On The Evening Of July 29, 1955 0:26
82 Mating Call Of The Green Toad, Bufo Debilis Insidior, Recorded At 9:00 P.M. On July 17, 1955, Ten Miles North Of Rodeo, New Mexico 0:25
83 Mating Call Of The Carpenter Frog, Rana Virgatipes, Recorded At Taunton Lakes, New Jersey, On The Evening Of May 13, 1955 1:02
84 Winter Mating Chorus Of The Pátzcuaro Frog, Rana Dunni, Recorded In Lake Pátzcuaro, Michoacán, Mexico, On The Evening Of January 27, 1956 0:40
85 Chorus Of Bullfrogs, Rana Catesbeina, Four Miles South Of Yuma, Arizona, With An Occasional Southwestern Woodhouse’s Toad, Bufo Woodhousei Australis, Heard In The Background 0:31
86 Chrorus Of Sonoran Desert Toads, Bufo Alvarius, Grean Plains Toads, Bufo Cognatus, Couch’s Spadefoot, Scaphiopus Couchi, And The New Mexico Spadefoot, Scaphiopus Multiplicatus, Recorded In The Rillito, At 10:30 P.M. On July 18, 1953, On The Outskirts Of Tucson, Arizona 0:54
87 Chorus Of Spadefoot Toads, With The Plains Spadefoot, Scaphiopus Bombifrons, In The Foreground, And The New Mexico Spadefoot, Scaphiopus Mulitplicatus, In The Background, And The Green Toad, Bufo Debilis Insidior, Occasionally In The Foreground 0:34
88 Frog Chorus Recorded Four Miles South Of Brighton, On The Seminole Indian Reservation In Okeechobee County, Florida, At 1:15 A.M. On Jun 2, 1954 0:38
89 Large Chorus Recorded West Of The Archbold Biological Station, Highlands County, Florida, At 8:40 P.M. On June 6, 1954 0:26
90 A Breeding Chorus Of The Southern Toad, Bufo Terrestris, With Pine Woods Treefrogs, Hyla Femoralis, In The Background 0:30
91 Sounds Issuing From The Oklawaha River, East Of Orange Springs, Marion County, Florida, On The Evening Of September 1, 1954 1:04
92 This Is The Same Chorus Reproduced As Track 3, Recorded One-Half Mile South Of The Archbold Biological Station On The Evening Of June 7, 1954 0:54