Giant Elemental Eagle

Elemental Essence:
When you summon the Eagle, choose a damage type: acid, cold, fire, lightning, or poison. The chosen type determines the eagles damage immunity and the damage of its Infused Strikes trait.

Armor Class 14 + PB (natural armor)
Hit Points 5 + five times your ranger level (the drake has a number of Hit Dice [d10s] equal to your ranger level)
A level 3 Ranger summoning the eagle would grant it: 
5+15 + (3d10)
Damage Immunities determined by the eagles Elemental Essence trait
Proficiency Bonus (PB) equals your bonus
Keen Sight The eagle has advantage on Wisdom (Perception ) checks that rely on sight.

Multiattack. The eagle makes two attacks: one with its beak and one with its talons.

Beak. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) piercing damage.

Talons. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.

Infused Strikes.
When another creature within 30 feet of the eagle that it can see hits a target with a weapon attack, the eagle infuses the strike with its essence, causing the target to take an extra 1d6 damage of the type determined by its Elemental Essence.