biology

Taiga bean goose

Taiga bean goose is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Taiga bean goose rather than just read about it. In short: The taiga bean goose (Anser fabalis) is a species of goose that breeds in northern Europe and Asia. It is migratory and winters further south in Europe and Asia.

Key takeaways

Taiga bean goose belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Taiga bean goose to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Taiga bean goose from memory before moving on to harder problems.

Reference excerpt

The taiga bean goose (Anser fabalis) is a species of goose that breeds in northern Europe and Asia. It is migratory and winters further south in Europe and Asia. This and the tundra bean goose were recognised as separate species by the International Ornithologists' Union and the American Ornithological Society from 2007, but are still considered a single species by some other authorities (collectively called bean goose), notably BirdLife International and the IUCN. The taiga and tundra bean goose diverged about 2.5 million years ago and established secondary contact c. 60,000 years ago, resulting in extensive gene flow.

Description The length ranges from 68 to 90 cm (27–35 in), wingspan from 140 to 174 cm (55–69 in) and weight from 1.7–4 kg (3.7–8.8 lb). In the nominate subspecies, males average 3.2 kg (7.1 lb) and females average 2.84 kg (6.3 lb). The bill is black at the base and tip, with an orange band across the middle; the legs and feet are also bright orange. The upper wing-coverts are dark brown, as in the white-fronted goose (Anser albifrons) and the lesser white-fronted goose (A. erythropus), but differing from these in having narrow white fringes to the feathers. The voice is a loud honking. The closely related pink-footed goose (A. brachyrhynchus) has the bill short, bright pink in the middle, and the feet also pink, the upper wing-coverts being paler and greyer, nearly of the same bluish-grey as in the greylag goose. In size and bill structure, it is very similar to the tundra bean goose subspecies Anser serrirostris rossicus, and in the past was sometimes treated as a sixth subspecies of bean goose.

Taxonomy The English and scientific names of the bean goose come from its habit in the past of grazing in bean field stubbles in winter. Anser is the Latin for "goose", and fabalis is derived from the Latin faba, the broad bean.

Subspecies There are three subspecies, with complex variation in body size and bill size and pattern; generally, size increases from north to south and from west to east.

Conservation

The western subspecies A. f. fabalis wintering in Europe are considered to migrate across three different flyways: Western, Central and Eastern; these have been confirmed by stable isotope analysis of their flight feathers. Anser fabalis fabalis is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies. It is a rare winter visitor to Great Britain; there are two regular wintering flocks of taiga bean goose, in the Yare Valley, Norfolk and the Avon Valley between Glasgow and Edinburgh, Scotland. A formerly regular flock in Dumfries and Galloway no longer occurs there.

References

Further reading Sangster, George; Oreel, Gerald J. (1996). "Progress in taxonomy of Taiga and Tundra Bean Geese". Dutch Birding. 18 (6): 310–316. Oates, John (1997). "Identification of Taiga Bean Goose and Tundra Bean Goose". Birding World. 10 (11): 421–426. Ruokonen, M.; Litvin, K.; Aarvak, T. (2008). "Taxonomy of the bean goose – pink-footed goose". Molecular Phylogenetics and Evolution. 48 (2): 554–562. Bibcode:2008MolPE..48..554R. doi:10.1016/j.ympev.2008.04.038. PMID 18550388. Brown, Dan (2010). "Identification and taxonomy of bean geese". Birding World. 23 (3): 110–121.

External links

RSPB Birds by Name – Bean Goose BirdGuides Bean Goose Page Cyberbirding: Bean Goose pictures BirdLife species factsheet for Anser fabalis "Anser fabalis". Avibase. "Taiga bean goose media". Internet Bird Collection. Audio recordings of Taiga Bean goose on Xeno-canto.

Illustrations

Worked examples

Example 1 — a first encounter with Taiga bean goose

Start with the simplest possible case. Write down what Taiga bean goose claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Taiga bean goose before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Taiga bean goose ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Taiga bean goose

In research: Taiga bean goose appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Taiga bean goose in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Taiga bean goose is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anser (bird), Birds described in 1787, Birds of Russia, so understanding it makes those chapters shorter.
In everyday life: Look for Taiga bean goose outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Taiga bean goose in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Taiga bean goose means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Taiga bean goose out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Taiga bean goose in simple terms?

The taiga bean goose (Anser fabalis) is a species of goose that breeds in northern Europe and Asia. It is migratory and winters further south in Europe and Asia.

Why does Taiga bean goose matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Taiga bean goose?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Taiga bean goose.