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A fifth headed for extinction?
Are they Priceless or Worthless?
You can take part in our vital conservation work
Find out more
ZSL is collecting data on the dolphins, porpoises, and seals that visit the Thames.
If you are lucky enough to see one, please help us with our survey by completing the sightings form below.
Download the Thames Marine Mammal form (179 KB) for species information and postal/fax submissions.
Or fill in the form below
What did you see?
What species did you see?
How certain is your identification?
Definite (100% sure)
Probable (75% sure)
Possible (50% sure)
Describe what you saw of the animal/s (e.g. shape of muzzle/beak/dorsal fin, flank markings, size or other distinguishing features)
How many individuals did you see
No. of adults
No. of juveniles (75-100%) Adult Size)
No. of calves/pups (50-75%) Adult Size)
What was/were the animal/s doing?
If other, please specify
If swimming, how fast was/were the animal(s) moving?
If swimming, in what direction was/were the animal(s) moving?
If interacting, what was it with?
Date of sighting
Time of sighting
Duration of sighting
Were you ...
On a vessel
If on a vessel, what type was it?
Location (e.g. landmark)
How far were you from the animal/s?
Was the weather ...
Few white horses
Many white horses
Any further notes?
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The Zoological Society of London is incorporated by Royal Charter - Registered Charity in England and Wales no. 208728.
Principal Office England - Company Number RC000749 - Registered address Regent's Park, London, England NW1 4RY
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