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The beaks of Anna’s hummingbirds have grown longer and larger over just a few generations

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Summary
Nutrition label

80% Informative

Anna ’s hummingbirds ( Calypte anna) have grown longer and larger over just a few generations thanks to the proliferation of hummingbird feeders after World War II .

The birds have expanded their range northward, from Southern California to British Columbia .

Researchers saw changes over the course of just about ten generations.

VR Score

86

Informative language

92

Neutral language

30

Article tone

semi-formal

Language

English

Language complexity

65

Offensive language

not offensive

Hate speech

not hateful

Attention-grabbing headline

detected

Known propaganda techniques

not detected

Time-value

long-living

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