Do you have any info on Caspian Terns in the Lower Mainland?

See the below message from a researcher in need of any information that you may have on Caspian Terns in Delta, Vancouver and the whole Lower Mainland of BC.

Hello everyone, 
Our research group, Bird Research Northwest (partnership among Oregon State University, USGS Oregon Cooperative Fish and Wildlife Research Unit, and Real Time Research), would like to ask for recent information of Caspian terns in Delta and Vancouver, BC area. A large colony of Caspian terns at East Sand Island in the Columbia River estuary (near Astoria, Oregon) failed completely last week due to high pressure by predators (bald eagles, peregrine falcons, western/glaucous-winged gulls) and probable low food availability due to high river flow (marine forage fish tends to be less available in the estuary in high river flow years). Our recent survey of the Columbia River estuary and conversations with local birders on the US side of Puget Sound strongly suggest that majority of terns nested at East Sand Island earlier this season have already dispersed to Puget Sound.  We are trying to figure out where those terns are now and if they are attempting to nest (or has established a new breeding colony).

We would very much appreciate any information on Caspian terns in your area (e.g. large congregations, sudden influx, potential nesting activities) in Delta and Vancouver area. Some of those terns have been marked with colored leg bands, so any sighting reports of banded individuals are also appreciated. 

Please email Yasuko Suzuki (yasuko.suzuki@oregonstate.edu) with any relevant information. Thank you very much!


Yasuko Suzuki
Postdoctoral Research Associate
Oregon Cooperative Fish and wildlife Research Unit
Department of Fisheries and Wildlife
Oregon State University

Comments

Post a Comment

Popular Posts

Dowitcher Identification

Image
Birders notoriously find it difficult to tell Short-billed and Long-billed Dowitchers apart. I have got a request to do an identification explanation on them so here goes, I hope it will be helpful. Short-billed Dowitchers and Long-billed look so similar. Using their habitat is helpful but not diagnostic. Short-billed Dowitchers tend to prefer Salt water and brackish water and Long-billed Dowitchers tend to prefer fresh water. However, I have OFTEN seen Short-billeds in freshwater and Long-billeds in brackish and salt water. Therefore, DO NOT rely on habitat. Another feature many people will tell you to rely on is spotting on the side of the flanks of Short-billeds and barring on the side of Long-billeds. Usually this is a mark that you can use but it is not always as distinct as you like. I have seen Short-billeds with a barred appearance to the flanks. It is only at the side of the breast where you have to look for this diagnostic feature for the spots on a Short-billed and t
Read more

Hawk Identification Tips from every angle (Sharpie vs Cooper and Red-tailed Subspecies)

Image
I get several questions about the difference between accipiters. The most common ones are between Sharp-shinned Hawks and Cooper's Hawks and between Cooper's Hawks vs Northern Goshawks (to a lesser degree). Next, I get many questions dealing with a certain race of buteos the Western Red-tailed Hawk and Harlan's. So I thought I would do a post on these to help answer those questions. I will deal with Cooper's and Sharpies and not Goshawks because they are much more common here and look much more alike. My friend John Reynolds inspired me to write this up. COOPER'S AND SHARP-SHINNED HAWKS EYE COLOUR - YELLOW OR ORANGE? RED? Normally a juvenile Cooper's hawk has a bright yellow eye and a Juvie Sharpie has a orange eye but some cooper's can have a dull yellow eye that looks a bit orangish. Cooper's Hawks usually only transition to the orange eye colour when they are sub adults, so in good light, it's a very very reliable feature. However you
Read more

STINT IDENTIFICATION

Image
As per request, here are some tips that I hope will be helpful in identifying and differentiating Red-necked Stint from Little Stint. I will also do a brief intro on Long-toed and Temminck's Stint... if you build it they will come right?😉 Red-necked and Little Stints look very much alike in worn breeding plumage. The amount of Red on the face, throat and breast in Red-necked Stint is vary variable). They look even more alike in non-breeding plumage, that is why it is essential to learn structural differences to separate the two. They are similar to Semipalmated Sandpipers as well as Sanderlings. Both species are often confused for Red-necked Stints. Little Stints rarely get confused with Sanderling because they have a hind toe which helps differentiate it from this species. Sanderlings in breeding or worn breeding are usually confused with Red-necked Stints but they are much larger than Red-necked Stints. Let's first start with Bills in this complicated ID proces
Read more

*Updated - The most famous Red-tailed Hawk is eating fish on the ground just like a Bald Eagle!

Image
Update - There are plans in the works to make a documentary film on this young Red-tailed Hawk who thinks he's an Eagle. You can read the latest news about that on CBC HERE . Watch this incredible footage of the little Red-tailed Hawk who grew up in a family of three Eaglets and 2 Bald Eagle Parents. He is imprinted now on Bald Eagles. He looks and acts just like one, as you can see here in the video below. He is standing over a large salmon carcass, just like a Bald Eagle would and he's eating the decaying flesh. Red-tailed Hawks like to eat voles and rabbits etc. not fish! Imprinting is usually irreversible according to raptor expert David Bird. However, I hope it's reversible so that he doesn't attempt to mate with a Bald Eagle, as the Eagle would kill him because it would view him as a Hawk. Eagle expert David Hancock said that the bird will likely starve and get killed by an eagle. He said this possibly can be prevented if someone grabs it and takes it to O
Read more

My First Mother's Day Without My Mother

Image
This is my first Mother’s Day without my mom. I am still deeply affected and afflicted with emotional pain. I took the day off from the RBA to just remember her and honour her. My dad, sister and I visited her grave with a bouquet of flowers. I cried a lot but it gives me a bit of comfort that she now has a head stone that I can touch. I didn't want to leave. I can’t believe it’s been just over 4 months since I lost her. To my Mom: Mom you were so great. You were so loved. I miss you so much today. I wish every day that you were here with Meghan, Dad and I.  I will never be truly happy again until I see you once more. Thank you for being such a wonderful mother. I will never ever forget you. I cannot wait to see you again in Heaven. Since you died in my arms, this is one of the hardest days I have been through without you. Normally I would be taking you out for brunch today, hugging you and telling you how much I loved you. Mom, you watched me take my first breath and I unfortunate
Read more