Peter Kaestner Breaks the 10,000 Bird Barrier!

July 24, 2024

On February 9, 2024, longtime ABA member and frequent Birding magazine contributor Peter Kaestner reached 10,000 birds on his life list. The ABA heartily congratulates Peter on this momentous achievement.

Peter is a now-retired career diplomat who has birded in seemingly every corner of the globe. His many previous contributions to Birding include a book review on Colombian field guides (, a review of SE Asia field guides (, and a recent feature story on how he planned to close the gap to 10,000 birds ( The forthcoming June issue of Birding will include an interview with Peter.

The 10,000-bird milestone is according to the taxonomy of the IOC (International Ornithological Congress), which recognizes a few more species than some other taxonomic authorities like eBird/Clements.

The ABA salutes Peter for his many decades of persistence and diligence, and for always being an exemplary ambassador for birds and birding.

On February 9, 2024, Peter Kaestner reached 10,000 birds on his IOC life list with an Orange-tufted Spiderhunter, Arachnothera flammifera, in the Philippines.

Peter saw the Orange-tufted Spiderhunter along the entrance road to the Tinuy-an Falls, nears the seaport town Bislig, in eastern Mindanao, Philippines. The bird was feeding in a small clump of Heliconia flowers.

Birding guide Felizardo “Zardo” Goring and driver William were present with Peter when he finally encountered bird #10,000, the Orange-tufted Spiderhunter.

As is his tradition, Peter celebrated with ice cream!