Breeding bird survey
A breeding bird survey monitors the status and trends of bird populations. Data from the survey are an important source for the range maps found in field guides.
A breeding bird survey monitors the status and trends of bird populations. Data from the survey are an important source for the range maps found in field guides.
A breeding bird survey monitors the status and trends of bird populations. Data from the survey are an important source for the range maps found in field guides.
Source: Wikipedia "Breeding bird survey" · CC BY-SA 4.0
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