Well, I won’t say that I actually chased it. I don’t “chase” birds in the true sense of the word, as I don’t like to hassle them. Perhaps, in this instance, the Ruby-crowned Kinglet (Regulus calendula), was actually harrassing me. He sure was being evasive. This was one time that I really felt I worked hard for the results that I got.
I had pulled my vehicle up close to some dense brush as I had seen movement in there. With my binoculars I could see him flitting around and stopping for a second or two on different twigs. At that point I was about 15 feet away from him. After several exposures, mostly on manual focus, because the surrounding leave and twigs were making it difficult to use auto-focus, I decided to chance slowly getting out of the car and moving closer.
I moved ever so slowly and eventually I was on my knees on the ground and I was only about 7 feet away. The end of my 100-400mm zoom lens was nearly touching the branches of the bush. I took several shots, then backed away. The kinglet gradually made it towards me, outside of the brush and near a wire fence. Here are the photos in the order that I shot them. These are just 4 out of about 60 exposures. I hope you like them.
Ruby-crowned Kinglet
Ruby-crowned Kinglet
Ruby-crowned Kinglet
Ruby-crowned Kinglet
As you can see, I got lucky again, being able to catch the red patch that usually is nearly invisible. The more I practice the luckier I get. Click on any image to see an enlargement.
This little bird is beautiful. One came to our feeder here in Arkansas a couple days ago. We had never seen one like it. When I saw your pictures, I realized it was the same kind of bird.
Yes, they are beautiful tiny birds. Always on the move. Thanks for your comment, Freeda.
Practice does make almost perfect, with a little luck thrown in, i have never seen this birdie, thanks for sharing with your lovely photo, MJ
Thank you for your comment, MJ. I appreciate it.
I love these shots! I had a similar experience with a Golden-crowned kinglet. Quick little fellas!
Thanks for your comment, Brian. I really appreciate it.
Bob, you have a way with Kinglets! I must say the Ruby-Crowned guys hardly ever reveal themselves when they stop by here during migration. Wonderful photos. Congratulations!
Thank you very much, Lisa. Maybe I should be called the Kinglet Whisperer.
I got a couple more good photos this morning that I may post later. 
What a beautiful series of shots, of a gorgeous little bird! Just superb.
Thanks a bunch, Jo. They are little cuties, but very quick.
Terrific shots of this cutie Bob!
Thanks, Phil. I appreciate your comment from such a talented bird photographer as yourself.
Birds are such cheeky little fellows to capture, but looks like you succeeded very well! Great series!
Thanks for commenting, Kate, I really appreciate your thoughts. These little guys are the toughest to photograph.
I have a mockingbird in my back yard that actually poses for me. : ) But yes, birds aren’t the most cooperative creatures!
Mockingbirds are very territorial, we too, have one that thinks our back yard is own private domain. No other bird dare enter.
I love his little ruby crown! Well done, Bob!
Thank you, Donna. I got lucky.
What an adorable bird. Have never seen one of those. Thanks for showcasing it Bob.
Thanks, Alison, They are seen in your state, too, occasionally. Maybe you’ll get a chance to see one.
Good job getting the little red crown!
Thank you very much, Cindy.
These photos are fabulous..yes, normally photos do not capture the red spot..you did well my friend. Love it..
Your efforts really paid off…..glorious details…..amazing!
Thanks, Rob, I appreciate you nice comment.
Cute little bird and the first two photos make this kinglet appear to have a royal cape as well as a crown! You did good in the “chase” and won out! hugs
Thank you very much, Beth. During those first photos, he was preening a bit, and spreading his wings and feather.
Awesome shots! Love the seeing the top of the head in the third photo.
Thanks, Melissa, I appreciate it. Super to hear from you.
What a beautiful bird, so glad you persisted.
Thanks, Martina. I appreciate it.
Love them! He’s a pretty little guy. Glad to see you have the patience — and the knees — to catch him for a snapshot.
Thanks a bunch, Shannon. I appreciate you nice comments.
Loved the story and the photos!
Thanks, Jerry, I’m glad you enjoyed it.