Here are some of the new additions to the Burdr Flickr group for the week of June 10th, 2011.

Here are some of the most popular posts, tweets, retweets, videos and photos from everything Burdr over the past week.

Here are some of the new additions to the Burdr Flickr group for the week of June 3rd, 2011.

A lot of hard work and perseverance is required when building some types of nests. Through a series of photos, watch two birds create their dream home!

Here are some of the most popular posts, tweets, retweets, videos and photos from everything Burdr over the past week.

Here are some of the new additions to the Burdr Flickr group for the week of May 27th, 2011.

Listen to the surreal sound of a Great Northern Loon out on the water in the early morning in this video by YouTube user StopSmilinItsBlindin.

Here are some of the most popular posts, tweets, retweets, videos and photos from everything Burdr over the past week.

Here are some of the new additions to the Burdr Flickr group for the week of May 20th, 2011.

Learn about the Red-crowned Cranes from the people at How Stuff Works.

Here are some of the most popular posts, tweets, retweets, videos and photos from everything Burdr over the past week.

Here are some of the new additions to the Burdr Flickr group for the week of May 13th, 2011.

World Migratory Bird day is this weekend. Do you have any plans?

Dominik Mosur and Josiah Clark try to beat the record of 149 species seen or heard within the San Francisco city limits.