Ⓙ — Ⓓ = Months January through December, each month divided into four weeks.
▁▂▃▄▅▆▇ = Rare to widespread. Species was observed at this location and week. Size of bar indicates abundance.
▢ = No sightings. Lists have been submitted for this week at this location, but this species was not observed.
░ = Insufficient information. Species has been observed at this location, but at a different time. No lists have been submitted to confirm or deny birds' presence for this specific week.
Your Favorite Places
Abundance by Week
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Houghton Mifflin Harcourt publishes over 50 books in the Peterson Field Guide series. For more information about HMH, please visit www.hmhco.com.
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