Crocodilian Communication
Crocodile Talk

Crocodilians are the most vocal of all reptiles, and calls vary widely depending on species, age, size and sex. Context is also very important, and some species can communicate over 20 different kinds of messages through sound alone. But just what are they saying?



HOW TO SPEAK CROCODILE

Learn to speak croc in under 5 minutes!

First select the species you prefer, then choose a call type. Click on either 8-bit or 16-bit to download the sounds.


HOW TO SEE SOUND

moreClick on this colourful icon in the "Learn More" column, and you'll be able to "see" that particular crocodile sound! These are called "spectrograms" and they show the change in frequency over time. With each spectrogram is a description of the sound, what the animal does when it produces it, and a "translation" into English! More spectrograms are being added all the time.


TECHNICAL DETAILS

All sounds are MONO. In most cases, the 8-bit samples are almost as good as the 16-bit versions, although the upper frequency of some calls is lost in 22 KHz playback. 16-bit is for fast connections, perfectionists or very patient people! All files are in .WAV format - this is the standard PC file format, but Mac owners should be able to convert it automaticaly with their browser.

Bandwidth of microphone used: 100 Hz - 20,000 Hz. This is fine for most juvenile calls, but the very low frequencies and of course infra-sonic frequencies used by bellowing adults are lost. All sounds digitally recorded on DAT. Spectrograms produced using SoundAlyze / BatSound by Pettersson Electronics.


CSL
SPECIES LIST


CSL
BIOLOGY DATABASE


LINKS
INTERNET LINKS
Alligator mississippiensis
DESCRIPTION QUALITY & SIZE DURATION LEARN MORE
THREAT CALL
(low intensity cough)
8-bit
4.0 k
16-bit
16.1 k
0.19 s more
THREAT CALL
(low intensity hiss)
8-bit
72.3 k
16-bit
289.3 k
3.36 s more
THREAT CALL
(high intensity hiss & bite)
8-bit
57.4 k
16-bit
229.4 k
2.66 s more
DISTRESS CALL
(2 yr juvenile, 7 calls)
8-bit
95.5 k
16-bit
391.1 k
4.43 s
DISTRESS CALL
(2 yr juvenile, 1 call)
8-bit
6.9 k
16-bit
27.5 k
0.32 s
HATCHING CALL
(post-hatching, 12 calls)
8-bit
110.0 k
16-bit
454.6 k
5.15 s
HATCHING CALL
(post-hatching, 3 calls)
8-bit
16.3 k
16-bit
65.0 k
0.76 s more
HATCHING CALL
(post-hatching, 1 call)
8-bit
2.8 k
0.13 s
DISTRESS CALL
(6 month juvenile, 3 calls)
8-bit
43.9 k
16-bit
175.4 k
2.04 s
DISTRESS CALL
(6 month juvenile, 1 call)
8-bit
2.6 k
0.12 s
COURTSHIP BELLOW
(adult male, 1 bellow)
8-bit
80.4 k
3.73 s


Alligator sinensis
DESCRIPTION QUALITY & SIZE DURATION LEARN MORE
COURTSHIP BELLOW
(adult male, 1 "cough" call)
8-bit
12.7 k
16-bit
50.7 k
0.59 s
COURTSHIP BELLOW
(adult male, 2 "cough" calls)
8-bit
58.0 k
2.69 s
CONTACT CALL
(1 yr juveniles, "excited" cough)
8-bit
9.3 k
16-bit
37.4 k
0.43 s


Crocodylus cataphractus
DESCRIPTION QUALITY & SIZE DURATION LEARN MORE
DISTRESS CALL
(1 yr juvenile, 6 calls)
8-bit
89.8 k
4.17 s
DISTRESS CALL
(1 yr juvenile, 1 call)
8-bit
4.6 k
16-bit
18.6 k
0.22 s


Crocodylus johnstoni
DESCRIPTION QUALITY & SIZE DURATION LEARN MORE
DISTRESS CALL
(2 week juvenile, 1 call)
8-bit
11.0 k
0.50 s
DISTRESS CALL
(6 week juvenile, 1 call)
8-bit
17.0 k
0.75 s


Caiman latirostris
DESCRIPTION QUALITY & SIZE DURATION LEARN MORE
THREAT CALL
(nesting female, high intensity hiss)
8-bit
25.9 k
16-bit
103.6 k
1.20 s
THREAT CALL
(nesting female, low intensity hiss
8-bit
52.8 k
2.45 s


Crocodylus porosus
DESCRIPTION QUALITY & SIZE DURATION LEARN MORE
HATCHING CALL
(hatching juvenile, 3 calls)
8-bit
48.7 k
2.26 s
HATCHING CALL
(hatching juvenile, 1 call)
8-bit
6.7 k
0.31 s


Crocodylus siamensis
DESCRIPTION QUALITY & SIZE DURATION LEARN MORE
THREAT CALL
(adult, high intensity hiss)
8-bit
43.9 k
16-bit
175.7 k
2.04 s


SPECIES LIST | BIOLOGY DATABASE | COMMUNICATION | CROC LINKS

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Design and content by Adam Britton © 1995-8 [email]


CROCODILIAN VISITORS SINCE 5TH MARCH 1996