*They have anisodactyl foot structure. Three toes point forward, one (called the “hallux”) back. That gives them a better grip and balance on a branch.
*They have a flexor tendons that tighten when they land and bend knee and ankle. The tightening is enhanced by tiny ridges, “tubercies,” and other things that secure the grip.
*They have scutellae (this is really getting into scientific terms!), which are rough scales on their toes and feet that help them grip on smooth or narrow perches.
*They have a tail (well, duh!) that acts as a counterbalance adjustment for the bird's center of gravity.
Caution: don't try this yourself on a local tree. You lack some of the necessary anatomical equipment. But maybe there's a picture here of how we can “get a grip on life” when we land precariously in a tough place. Or how we want to be really close and personal with God—depending on Him and trusting in Him.
I'm grateful God didn't put “bird legs” on humans but an amazing complex foot that can do all sorts of wonderful stuff (although clinging to a narrow tree branch isn't in the list). “Clinging” (not the bird type) is a very Biblical concept. In the original Hebrew, it's dabeq, which means “to cleave, to adhere to.” David used the term in Psalm 63:8. In the King James version, it's rendered, “My soul followed hard after thee.” The NIV translates: “I stay close to you; your right hand upholds me.” We might paraphrase, “God, I've landed in a precarious place. I want to be really close to You, depending on You and trusting in You.”
That psalm's background adds perspective to that sense of agitation in the midst of trust. David probably wrote it when he was the wilderness of Judah, likely in a lot of personal distress in his long siege of avoiding King Saul's wrath and murderous search for him.
It's been said of super-busy or super-desperate people that they are “trying to find balance.” And maybe that's where the little bird (whose top-heavy body somehow achieves “balance” with those thin, spindly legs) can teach us something. It's not all about our effort when we find ourselves in a precarious position. God has equipped us to find the right grip in places that defy our spiritual balance. We don't have a bird's amazing anatomy, but we do have God's presence and Word. He can strengthen our “grip” on the fragile branches of life. And He can help us find the balance to stay steady when, instead of flying high, we're to sit and wait for His next instruction.