Blog

Only in Arizona

posted by Jerry Liguori at
on Saturday, March 15, 2014 

Check out this photo...."contrasting" is the word that fits best. A slim-winged, long-tailed white colored hawk (adult male Northern Harrier) in the same frame of view as a stocky black hawk (Common Black Hawk). One of the reasons I love visiting Arizona! Sorry I haven't been blogging, but I will start blogging several times a week for HawkWatch International as soon as their website changes take place, should be soon.

Moving my blog

posted by Jerry Liguori at
on Thursday, March 6, 2014 

I have recently started to collaborate with HawkWatch International on some ideas, and one of the things I will be doing with them is writing for their blog and starting a Hawk ID forum. I've been saving my blog ideas, so I haven't posted here in a while...although I've wanted to. But, I want things to be fresh when I move over to the HWI page. I believe it will be easy to subscribe to that page and we will link their page with this page anyway. So, hope to start blogging soon. Here is a photo of a Black Hawk I took last year. I should be seeing bunches in about a week when I head down to AZ for the migration, I'll let you know how it goes!!!

White-morph Gyrfalcon

posted by Jerry Liguori at
on Saturday, February 22, 2014 

Yesterday I photographed a white-morph Gyrfalcon in Salt Lake City...yes, Salt Lake City, where Gyrfalcon is a rare bird! Not only that, but white-morphs are especially uncommon (as well as true dark-morphs), but the catch is that this bird was an escapee falconry bird. Oh well, however, the bird was still very enjoyable to see up close and watch in flight. It flew around a few times crossing over fairways (did I mention it was on a golf course?) and it was a sight to see regardless. Everything else about it besides being captive was pure GYR! And, being on a golf course gave me an itch to get out and hit a few balls. Here are some pics ('click' to enlarge) I got where the jesses on the legs were hidden. I did take many more photos with the jesses visible, and even though some are full frame and beautiful, I don't really find them desireable. And, if anyone is willing to take a stab at the age of the bird, go for it -- white ones can be tricky, but not with views like this.

Unbanded Remiges on Red-tailed Hawks

posted by Jerry Liguori at
on Wednesday, February 19, 2014 

It is known that adult Harlan's Red-tails often have unbanded, mottled, or a mix of unbanded/banded remiges (primaries and secondaries), but of course there are exceptions to EVERY rule. Here are a few Red-tails that show varying degrees of banding to the remiges. The first 3 are adult Eastern Red-tails (the 2nd bird shows several Krider's traits). The 4th bird is a juvenile Western that also had a tail pattern simlar to the remiges (broken bands that create a mottled effect). The last 2 are adult Harlan's for comparison. Just thought I'd show these for future reference...I have a bunch of examples from my own collection, but it is valuable to show that others are documenting this stuff too. Collaboration is important!

Prairie Merlins

posted by Jerry Liguori at
on Sunday, February 16, 2014 

Just thought I'd post a few "brown" (adult female or juvenile) Prairie Merlins for anyone to reference. The first 4 images are Prairie Merlins, the rest are Taiga Merlins for comparison. No explanation needed, basically, the Prairie Merlins are pale compared to Taiga.

The "Northern" Red-tailed Hawk

posted by Jerry Liguori at
on Thursday, February 13, 2014 

Brian Sullivan and I just submitted an article to be printed in North American Birds on the "Northern" Red-tailed Hawk, referred to as B.j. abieticola, also referred to as "Canadian" Red-tailed Hawk. This is the heavily marked borealis type that often gets confused for Western Red-tailed Hawks reported in the eastern half of the U.S. in winter. Keep an eye out for these types….

What is abieticola? Well, Jon Ruddy from Ontario just did a piece on this taxon for eBird regarding the variants he sees in his neck of the woods, and it should be up on the site soon. Today, abieticola is thought of as a form of the Eastern Red-tailed Hawk (B.j. borealis), but not enough is known about it to say either way if it is a separate subspecies, as some have proposed in the past. It does inhabit a wide-ranging but specific area, and can be told from "southern" borealis (or what we think of as typical lightly marked borealis), but there is much overlap in the plumages of the two types, and they interbreed in southern Canada and the very northeastern half of the US. The purpose of our article is to bring some attention to the subject and get birders to document and take a second look at Red-tails in general. The article shows over 20 different individuals and gives a sense of the plumage variation within this type, so hope people see it.

Here are some "Northern" Red-tails, but the variation is extensive and shown in the print article:

BC Red-tails

posted by Jerry Liguori at
on Monday, February 10, 2014 

Kevin Hood and I started a site where people can share photos and information about Red-tailed Hawks in the British Columbia area. We are particularly interested in seeing what kind of variation in plumage we might find since the area is very understudied and relatively a mystery. Please pass this note on to anyone you might think is interested, and here is the link for anyone who wants to check it out. We just made the blog active today.

http://bcredtails.wordpress.com/





Powered by Blogger

Subscribe to
Posts [Atom]