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Mammal Families
Sloth

Although there is much more to mammalwatching than listing species, it is – for many of us – a fun way to track our effort. Mammal listing is nothing more than a friendly competition. But I believe it can motivate mammalwatchers and also lead to a more interactive and lively community. So if you have a list please share it here. Any questions about what people have seen or where? Just click on their list and ask them.

Create an account – or login to your account – then click on My Account from the top menu to add or manage your lists (or simply click here).

Download the list of all mammal families (Can be used to create a pdf ready for uploading your list)

Mammal Families watching rankings

#

Name

No. of species

List

Latest observations

1

Jon
Hall

151

View

Just 9 families left. A beautiful Banded Linsang in Thailand was my latest in August 2025

2

Martin
Royle

132

View

Latests Families: Shrew Opossum, Franciscana & Monito del Monte - last updated 22nd Oct 2025

3

Alex
Meyer

121

View

Beluga in Tadoussac Sep '25, Beaked Whales in The Azores July '25, Dwarf Sperm Whale in Mexico June '25, Gundi & Naked Mole Rat in Ethiopia Dec '24, Franciscana in Argentina Nov '24, Chinchilla Rat & Octodonts in Chile Oct '24, Amazon River Dolphins in Bolivia Oct '24

4

Stuart
Chapman

112

View

Family highlight is probably the Laotian rock rat (Diatomyidae)

5

Brett
Hartl

109

View

Plowing through Australia currently

6

Jan
Ebr

98

View

Sperm Whale and Beaked whales Azores 2025, Octodonts and Chincilla Rats Chile 2025

7

Ben
Chapple

92

View

Not far to go to 100!

8

Becky
Royle

79

View

Birch-Mouse - last updated 22nd Oct 2025

9

Michael
Johnson

75

View

New this year: Solenodons, Spiny Rats (Hutias), Colugos.

10

Ashton
Reiser

57

View

Beaked Whales, Rhinoceroses, Dolphins, Sperm Whale, Cats, Sloths, Kangaroos, Armadillos

11

Warren
Gilson

51

View

Most recent and probably my favourite family - Mustelids, with Asian Badger and Altai Mountain Weasel

12

Tiger
Royle

45

View

Birch-Mouse - last updated 22nd Oct 2025

13

B.
Kao

43

View

Heteromyidae in Las Vegas Oct '25; Geomyidae in Las Vegas Sep '25; Felidae, Castoridae, and Bovidae in Las Vegas Aug '25; Ziphiidae, Kogiidae, and Physeteridae in Azores '25

14

Ellen
Linton

40

View

Latest family lifers are Mexican Long-tongued Bat and Collared Peccary.