US Bird Population Density Map: A Comprehensive Guide

The US bird population density map is a crucial tool for understanding the distribution and abundance of bird species across the country. In this article, we will explore the various types of range maps available in Birds of the World (BOW) and their significance in providing accurate and up-to-date information on bird populations.

Traditional Range Maps

The traditional range map is a familiar sight in any field guide, offering a quick overview of where a species occurs. These maps depict seasonal occurrence as colored polygons, providing a coarse but effective representation of a species' range. In BOW, you can find traditional range maps on the Introduction and Distribution pages in long format accounts, as well as on the right-hand side of the three-column layout for every short format account.

eBird Range Maps

In cases where a basic range map does not exist or inadequately represents the taxon's range, BOW features eBird range maps. These maps are generated using observational data from the eBird science team at the Lab and are available for all taxa, including subspecies groups. Zooming in on these maps reveals the actual underlying data points for each observation, along with associated checklists and media.

One of the unique features of eBird range maps is the ability to enable negative data, which shows where observation data exist but the species was not recorded – a critical point in understanding bird populations. Higher frequencies denote higher occurrence, meaning you're more likely to find the bird in deeper purple shaded zones.

Abundance/Range Maps

For many North American breeders, BOW is showcasing new abundance/range maps coming out of the eBird science team at the Lab. These maps are more detailed than traditional range maps and provide a static range map covering the full annual cycle of a species.

In cases where a basic range map does not exist or inadequately represents the taxon's range, BOW features eBird abundance/range maps. These maps depict frequency of occurrence based on eBird observational data as 100 or 20km grids.

Taxonomy Mismatches

Due to taxonomy mismatches, some taxa that Birds of the World considers a species may never have had a basic range map that adequately represented the taxon's range. Our goal is to have a basic range map like this for every species in BOW, but at the outset there are some gaps.

Why Range Maps Matter

Exactly where a species occurs on the planet is a critical piece of information for its conservation. Understanding bird population density and distribution is essential for developing effective conservation strategies. By providing accurate and up-to-date range information for every species, BOW aims to support conservation efforts and promote a deeper understanding of our avian friends.

In conclusion, the US bird population density map plays a vital role in understanding the distribution and abundance of bird species across the country. From traditional range maps to eBird range maps and abundance/range maps, BOW offers a range of tools for exploring the complex world of bird populations. Whether you're a seasoned birder or just starting your avian adventure, these maps provide a comprehensive guide to the wonders of the US bird population.

Us bird population density map