The Life Starter
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Course Library · Lesson 3 of 6
Life · Guided lesson

Identify only what evidence supports

About 23 minutes · 5 reading + 18 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
See this course’s project requirements

A citizen-science practice kit with a bounded question, effort log, teaching-key identifications, count audit, cautious comparison, and submission-eligibility checklist.

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • Define a fixed-point question and record session effort.
  • Apply the supplied teaching key without forcing uncertain IDs.
  • Count distinct individuals using movement evidence.
  • Compare sessions with duration, weather, and nondetection limits.
  • Label all practice data fictional and complete the eligibility audit.

Review and revise

Use these criteria to check your work and choose what to improve.

  • Dates, durations, protocol, and distance follow the supplied rules.
  • Identification and count decisions match the evidence.
  • Comparisons avoid population and absence overclaims.
  • The submission checklist excludes invented and ineligible records.
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Before you begin

The idea in everyday life

Fictional teaching key: Bird A has a triangular red head patch and a short thick bill; Bird B has a round blue head patch and a long thin bill. Both features must be visible to assign a label. Observation O1: red triangular patch, short thick bill. O2: blue patch, bill hidden. O3: round blue patch, long thin bill. These invented features do not identify real species.

The idea

A broad honest label is more useful than a confident unsupported identification.

Follow along

Identify only what evidence supports: guided practice

A broad honest label is more useful than a confident unsupported identification.

Use paper or a free local text editor. This is an original fictional practice case; do not submit its records to a real service. Start this lesson with these facts, even if an earlier variation changed them. Fictional teaching key: Bird A has a triangular red head patch and a short thick bill; Bird B has a round blue head patch and a long thin bill. Both features must be visible to assign a label. Observation O1: red triangular patch, short thick bill. O2: blue patch, bill hidden. O3: round blue patch, long thin bill. These invented features do not identify real species.

  1. 1. Read the key

    Record the two required features for each label.

    You should see: A: red triangular patch plus short thick bill; B: round blue patch plus long thin bill.

    The key requires a feature combination, not one impression.

  2. 2. Classify O1 and O3

    Match the complete observations to the key.

    You should see: O1: A; O3: B.

    Both required features are present in each match.

  3. 3. Keep O2 uncertain

    Apply the rule to the hidden bill.

    You should see: O2: unidentified teaching bird; do not force B.

    Missing a required feature prevents a supported label.

  4. 4. Write useful notes

    Preserve the visible feature and missing detail for O2.

    You should see: Blue head patch seen; bill not visible; identity unresolved.

    Specific uncertainty can be reviewed later without inventing details.

Now change one thing

Changed observation: triangular red patch but bill hidden. Enter A, B, or UNKNOWN under this key.

Your work

What to finish

Identify only what evidence supports record with the worked decisions and changed-case check.

Common mistake

Watch for this

Treating a single color or automated suggestion as a complete identification.

How can I tell I understand it?

Use a supplied field key and preserve uncertain observations. Explain the evidence behind the result and correct any mismatch.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1A key requires two features, but only one is visible. What label is justified?
2An identification app suggests a species inconsistent with a clearly observed bill shape. What should happen?
3Which note is most useful for an uncertain sighting?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
3
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

Go to the knowledge check
Optional course overview video · same video as Lesson 1
Cornell Lab of OrnithologySubmit Your Sightings on eBird Mobile - eBird EssentialsYouTube
Optional course overview

Submit Your Sightings on eBird Mobile - eBird Essentials

From Cornell Lab of Ornithology. Watch here or open it on YouTube .

Optional course overview. Follow the written steps below at your own pace.
Tools, templates, and lesson sources

Tools and templates

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Sources and further reading

Explore the references behind this lesson.

Cornell eBird: Rules and Best Practices
Source & access notes · checked 2026-09-12

Inspected complete checklists, counts, and prohibition on synthetic, other-person, and remote-camera records.

Access: Public page or PDF inspected without payment or institutional sign-in on September 12, 2026. Optional external accounts are unnecessary for this course.

Reuse: Link and original paraphrase only. Public access does not grant blanket reuse; no provider text, figures, or exercises are reproduced.

Cornell Lab: Bird Monitoring Toolkit
Source & access notes · checked 2026-09-12

Inspected monitoring purpose, method selection, baselines, and participatory science scope.

Access: Public page or PDF inspected without payment or institutional sign-in on September 12, 2026. Optional external accounts are unnecessary for this course.

Reuse: Link and original paraphrase only. Public access does not grant blanket reuse; no provider text, figures, or exercises are reproduced.

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