And none of that even touches upon the greater spirit of an animal and what that means to most first nation and aboriginal peoples. Sorry Animal Speak by Ted Andrews is not a great source document for any of this regardless of how it is pushed by many new age callings. Nor are the many sites that proliferate on the net that copy and paste that same info or the cards that claim some special enseight by using them with their animal pictures.
Additionally the seighting of an animal does not mean it means anything. It's when you see it over and over and its routine is such that it demands ones attention simply because of the strangeness of the sighting. It's like for a matter of days I kept seeing 3 blue herons and 3 egrets. Always a heron then an egret then a heron then an egret then a heron then the final egret, yet it was not the seighting of them that made it unusal as they are relatively common water fowl in this area, it was the unusual interlacing of them and that frequent interlacing that made it unusual.
To use your humming bird scenario you didn't say what you were wearing for instance. Colors often attract them. You didn't say what you may have had out there with you, sweet waters or drinks also tend to attract them due to the sugar smell. You indicate you were laying prone which means you would be doing nothing to threaten them so they would not pay much attention to you. You didn't state what type of fauna or bushes may have been near you so you can't speak on that factor. Probability it was not trying to say anything and you jumped to conclusion as to it having a meaning.
Unusual to me is for instance your driving up the mountain and come around a curve and there sits a large black bear looking at the road and eating the remains of a bag of McDonalds french fries. Yes that happened to me on Shenandaoh Mountain in Pendleton County West Virginia. Unusual is when you have to stop and walk up to a tree never noticing the bear that is standing there eating berries and simply turns to look at you and then sits down to finish eating the handful it holds. Yep that happened as well. Unusual is when a fawn steps away from its herd and comes up to you and stands there and allows you to touch it before it turns and runs off into the woods. Yep that one happened as well. Unusual is when you stop to watch a cougar (Mountain Lion) in a region where they say they are gone, that one happened as well. But none of them had a story or lesson to convey in the seighting of them, none of them indicated they were totems, power animals, guides, spirit animals, etc for all were doing what was natural to them even though some of it may seem strange. A fawn may come up because it has not learnt to fear man yet for instance.
But a humming bird coming around a person laying upon the deck of a porch really is not unusal nor does it have to mean anything. And no what you describe is not unusual for a humming bird to do i've seen up to four at a time do that very thing and also play around the people sitting there.
Today to many are buying into the notion that because they saw some animal and it was unusual to them it must mean something.
This is not to say that strange and unusual things do not occur nor that an animal can not convey a message or lesson. Yet those things are never mistaken in that they are so unusual and often so repatitive that you can not ignore them and they are so in your face that it leaves no doubt.