The Gracefulness of Swans

The water is still quite shallow in portions of Briggs' Pond, forcing these Mute Swans to abandon their gracefulness as they cross the sand bar into the deeper portion of the pond. They remind me of a toy that I had as a child - I pulled it behind me on a string and the head and feet bobbed up and down as it rolled. I guess I am dating myself here! : ) See if you can tell when the mosquito landed in my eye!

And maybe someone out there would be willing to help me with my tree cataloging project in my yard. Most of the references I have are pretty confusing. When it comes to tree knowledge, I am about 5 years old. Today my question is, do these trees look like shagbark hickory.  They are so tall, I can't get a decent picture of the leaves, unfortunately. 

tree a

tree b

another view of tree b higher on the trunk

Any and all help gratefully received!

Ok, one last picture - this one is leaves. 

Thanks, again!