Birding/Expert Profile

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Any and all about WILD birds - the science of ornithology. Information about birdwatching, ecology, conservation, migration, behavior, banding, rehabilitation, feeding, songs, binoculars, identification, and careers in ornithology. No questions about pet or caged birds, please.

Experience in the area

Have a PhD and over forty years as a professional ornithologist - research, teaching, author, speaker, webmaster of . Have written thirty scientific papers, three bird field guides, a textbook in ecology four other bird books, the latest being "Beaks, Bones, and Bird Songs". Have traveled to 100 countries watching birds and have spoken to hundreds of groups about birds.


PhD in Zoology/Ornithology; Emeritus Professor of Biological Sciences; former Dean of the College of Natural Sciences at California State University, Chico

What do you like about this subject?

Birds are something that everyone of any ability can enjoy; birds also teach about nature and conservation as well and are ecological indicators of a changing environment.

What do you still hope to achieve/learn in this field?

I hope to keep learning and learning as the more I know the more I know there is to know. And I hope to keep educating the public as to the importance of birds and the environment.

Something interesting about this subject that others may not know:

Birdwatching is the fastest growing outdoor sport in the U.S.and many other countries. It is the most accessible of all outdoor sports - from children to seniors, and the fit to the physically challenged.

Something controversial or provocative about this subject

Birds are threatened by habitat destruction, pollution, and global warming.Unfortunately, at least 25% of the bird species in the U.S. are in decline.

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
James A. Colaiaco01/08/17101010Thank you, Dr. Lederer. We appreciate your .....
Bill08/21/16101010Thanks, Roger! Have not seen a lot .....
Bill08/10/16101010Many thanks! I had not considered that .....

Recent Answers from Roger Lederer

2017-01-08 Northern Cardinal:

Hi James. The black feather does not indicate age, so we don't know how old this bird is. It's not unusual for birds to get used to people like this, but the danger is that they get so used to people they

2016-11-19 migratory birds:

Did you not get this answer?( I meant to say that to fully answer this question would take many pages of explanation.)    "As I said, this is a long and complicated answer whlch I answer fully in my book

2016-11-18 migratory birds:

As I said, this is a long and complicated answer whlch I answer fully in my book. But briefly, all birds respond to daylength as their clue for migration. No, they don't all start migration at the same

2016-11-17 migratory birds:

Depends on what you mean. Migration itself is an instinctive process so it is in their genes. But if you are asking how they know when to migrate, it has to do with day length. When the days get shorted

2016-08-22 crow question:

Here's my opinion. When a bird is kept in captivity, for whatever reason, he/she is kept out of the gene pool. He/she is as good as dead because he/she cannot reproduce. I would rather allow a partially


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