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How to Keep Track of Every Animal You’ve Seen

What a life list is, how birders and herpers keep one, which rules to borrow, and how to start from animals you have already seen instead of from zero.

AnimalDex Field DeskPublished August 30, 20265 min readUpdated October 7, 2026
Birders watching Arctic seabirds
Photo by USFWSAlaska, Public domain

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In this guide
  1. You’ve already seen lots of animals. You just never tracked them.
  2. What a life list is
  3. Rules for your own list
  4. New encounters and past encounters
  5. What not to expect from a life list

You’ve already seen lots of animals. You just never tracked them.

Most people do not need a new camera. They need a place that answers which animals they have already encountered: the zoo day, the holiday snake, the birds on a morning walk, the fox on the bins last winter. Those encounters happened. They were simply never written down.

A Dex is that record: unique AnimalDex entries for species and supported animal groups, each with a historical place you confirm and a setting that says wild, zoo, farm or domestic. It is not a guessed count from a feed, and it does not have to begin on the day you install an app.

Young birdwatchers looking through binoculars in a green woodland
Birders at a bird inventory station. Most life lists begin with a pair of binoculars and a notebook. Photo: NPS, public domain, via Wikimedia Commons.

What a life list is

A life list is the running tally of species a person has identified in their lifetime, one entry per species, with the first encounter recorded. Birders invented the modern version, and the American Birding Association's recording rules are the reference everyone else borrows from. Under those rules a bird counts if it was alive, wild and unrestrained when you encountered it, if you identified it with confidence by sight or sound, and if you observed it within the ABA's code of ethics. A bird heard but never seen is countable. A bird in a zoo, an aviary or a rehabilitation centre is not, nor is an escaped pet unless the species has an established wild population.

Herpers keep life lists too, with less formal rules and a few conventions of their own: wild and free-living animals only, a separate column for animals found dead on the road, and a habit of noting whether an animal was found under cover or in the open. Many also keep a county list, a year list and a patch list for the one site they walk most.

For most people in Europe the first bird on the list is a robin, 14 cm of orange breast on a garden fence, and for most in North America it is an American robin or a house sparrow. The list starts with the ordinary and that is its point: you have been seeing animals all along.

European robin perched on a wire in front of a brick wall
European robin (Erithacus rubecula): the first entry on a great many life lists. Photo: Neil McIntosh, CC BY 2.0, via Wikimedia Commons.

European Robin

Rules for your own list

You do not have to adopt the ABA's rulebook, but you should decide your rules once and apply them every time. The table shows how birders and herpers handle the common questions and what a general wildlife list usually does.

QuestionBirders (ABA rules)Herpers (common practice)A general wildlife list
Captive animalsNot countableKept off the field listKeep, but record setting: zoo, farm, domestic
Heard but not seenCountableUsually a separate heard-only noteNote it; a capture still needs a photo
Dead on roadNot countableSeparate DOR listRecord, mark as dead
Uncertain identificationNot countableLogged to genus or groupGroup-level entry, upgrade later
Established introduced speciesCountable (e.g. house sparrow in the Americas)Countable, often flaggedCountable, note it
Evidence requiredNone; honesty systemPhoto strongly preferredPhoto per capture

New encounters and past encounters

New encounters belong to live capture in AnimalDex: a photo taken in the app at the moment of the sighting, with identity, setting and location attached. That is the equivalent of the birder's field notebook entry, made on the spot.

Past encounters can come from eligible Instagram wildlife posts after you review identity and location. AnimalDex looks through a connected professional account for animal posts; you confirm what each shows, where it was and whether it was wild or captive; the original media becomes a capture. Wildlife memories often pre-date the app you eventually choose to track them in. Install day does not have to be day one.

Wildlife collection appImport Instagram wildlife photos

What not to expect from a life list

Not every photo resolves to a species. A gull in winter plumage, a brown lizard at speed, a bat at dusk: some animals stay at group level when that is the honest catalogue result. Imported posts build the collection; they do not add qualifying live-capture wildlife signals for Creator Rewards, which is currently paused. And a list is not a competition unless you want it to be. Most people find the number matters less than the memory each entry brings back.

  • Write your rules

    Captive, heard-only, dead on road, uncertain ID. Decide once, apply every time.

  • List from memory

    Garden, zoo trips, holidays, pets excluded or included by your rule. Most adults reach fifty species in ten minutes.

  • Check the archive

    Instagram and the camera roll hold encounters you forgot. Review before you count.

  • Capture the next one

    Tomorrow's pigeon counts. Take it live, in the app, with the place confirmed.

Wildlife photography life list

Quick questions

Short answers to common questions readers ask on this topic.

What is a life list?
A life list is a running record of every species a person has identified in their lifetime, with one entry per species and usually the date and place of the first encounter. Birders formalised it; the American Birding Association's rules count only wild, unrestrained, confidently identified birds. Herpers, mammal watchers and general wildlife fans keep the same kind of list with their own conventions.
Do zoo animals count on a life list?
Not under birding rules, which exclude captive and restrained animals, and not on a herper's field list. A general wildlife collection can keep them as long as each entry records its setting. AnimalDex stores wild, zoo, farm or domestic on every capture so the two kinds of record never merge.
Does a bird I only heard count?
Under ABA rules, yes: a bird identified by sound alone is countable. Many birders still keep a note of which entries were heard-only. In AnimalDex a heard-only bird is an encounter you can note, but a capture needs a photograph taken in the app.
How do I start tracking animals I saw years ago?
List what you remember first, then check where the photos live. Eligible wildlife posts on a compatible Instagram professional account can be reviewed into AnimalDex: confirm species or group, the historical place and the setting, and the original media becomes a capture. New sightings are live captures from then on.
Is there an app to track animals I have seen?
Yes. eBird tracks birds, iNaturalist tracks any organism as community-science observations, and AnimalDex keeps a species collection built from live in-app captures and reviewed Instagram imports, with setting and confirmed location on each entry. Many people use one platform for records and one for the collection.

Animals mentioned

Jump from this article into the species pages behind the examples, systems notes, and field-guide references.

European Robin

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