All trees and shrubs will provide  something of value to birds - nesting sites, insect food, shelter from weather and predators.

There are, without doubt, birds in your garden now.  if you wish to encourage more birds and more varieties of birds around your home, you can do so by providing a variety of trees and shrubs, particularly those that provide food in the form of fruit, berries, nuts or seeds.

It's the Berries 

Bird-watchers know to plant berried shrubs for birds to feed on in winter. I still haven't got over the thrill of seeing two pairs of bluebirds feasting on my winterberry shrubs (Ilex verticillata 'Red Sprite') in January. 
 

Winterberries are in the holly family, so you need both a male plant and a female plant in order to get fruit. 'Jim Dandy' winterberry is a good male pollinator for several female varieties.

'Sparkleberry' is a heavy-fruiting knockout that's small enough to fit in most any garden bed.

Chokeberries (Aronia arbutifolia and Aronia melanocarpa) have red or black fruit, most viburnums have showy fruit, and crab apples are spectacular for orange or red fruit that hangs on sometimes well into spring. (Be sure to select varieties resistant to apple scab disease.)

'Winter King' hawthorn (Crataegus viridis 'Winter King') has both horizontal branches and red berries to give it a high winter ranking. Place some of these plants within view of your windows so you don't miss avian snack time.

If you grow Sweet Cherries, you know they have to be netted to prevent the birds from taking them.  Mayday trees and Shubert's Chokecherry have fruit we do not find palatable but is enjoyed by birds.  Sour Cherries that we use for pies also make a nice ornamental small tree.

Mountain Ash

The brilliantly coloured berries of Mountain Ash are eagerly devoured by Robins, Cedar Waxwings and other birds.  Many varieties and forms of Mountain Ash are available and they are highly ornamental trees.  (The birds do not like the fruit of the variety 'Leonard Springer').  If not eaten in the fall, they persist on the tree all winter.  Their height above snow cover provides food when mid-winter sources are scarce and are also used in early spring by the first returning migrants.

Russian Olive

Many trees have desirable fruit for birds, which we hardly notice, however the birds find with ease since the fruit is not highly coloured.  Russian Olive is a good example and with its silver foliage and fragrant yellow flowers, it makes an excellent choice for gardeners.

White Birch

Seed-eating birds such as Redpolls, Pine Siskins and Goldfinch find an abundance of seed on this attractive tree.  It is particularly valuable to those birds which stay with us all winter.

Maple and Oaks

If your garden is large enough for those tall trees, you will attract Orioles, Tanagers and the Red-eyed Vireo as they prefer the safety of the high upper canopy.

Conifers

The dense foliage of Spruce, Pine, Fir, Larch and Hemlock provide secure nesting sites for amy birds and an ample supply of seeds from their varied cones.  Cedar Waxwings love the red fruit of the Yew in the early fall.

Small fruit, such as Currants, Raspberries, Blackberries and gooseberries will certainly attract birds.  Blueberries will have to be netted as they are so desirable.

Among ornamental shrubs, there are many with choice fruit.  the dark mature fruit of elderberry is ravenously eaten by many songbirds, including thrushes and Warblers.

All Viburnums except the double-flowered Snowball, have berry fruit.  the fruit of the High Bush Cranberry is not usually taken by birds, but can be a life-saving source of food in severe winters.  Nannyberry fruit is found more palatable and is a favourite of the Brown thrasher.

Other shrubs with berries are:  Oregon Grape Holly, Flowering Currant. Bush Honeysuckle, Rugosa rose, redleaf rose, all dogwoods, Serviceberry, Privet, Coralberry, Snowberry, and Autumn Olive.  the fruit of the Coyoneaster and Firethorn are not usually taken by birds.

Weeds and Grasses

If you can provide a 'wild' spot in your garden for tall Grasses, thistles, Goldenrod and Ragweed, you will add greatly to your list of bird visitors - Honed Lark, Meadowlark, Butings, Bobolink and others.

In a cultivated garden ornamental grasses can be used, leaving them to stand into the winter with their supply of seeds.  So too, with many annual and perennial plants, which we normally remove or cut down in the fall; if left in place, they provide abundant seed for birds in winter.  For example, Sunflowers, Cosmos, Zinnias and Asters.

Virginia Creeper

A climbing vine with brilliant foliage in fall, Virginia Creeper's bountiful harvest of shiny black berries is enjoyed by many birds, including Kingbirds, Flycatchers and bluebirds.

Attracting Hummingbirds

the preferred flower for the Hummingbird is red in colour and tubular in form.  Hummingbirds prefer a massed bed as it has to visit about one thousand blooms per day to meet its requirement of sweet nectar.  Next to red, hummingbirds prefer orange and pink but also visit other colours of flowers.  Other summer flowers that attract are - Petunias, Phlox, Snapdragon, Cleome, Sweet William, Nicotiana and Zinnias.

Favourite perennials include Gladioli, Red Hot pOker, Monarda, Bleeding Heart, Columbine and Penstemon. Vining Honeysuckles like Dropmore Scarlet and Heckrot's Goldflame have the correct shape and colouration.  Also, Morning glory, Trumpet Vine and Scarlet Runner Bean, Flowering shrubs include Weigela, Beauty Bush, butterfly Bush, Carolberry, Flowering Currant and Flowering Quince.

Water 
Hummingbirds need eight times their weight in water everyday.  If your property does not include a pond or stream, providing water in a birdbath or large saucer will bring birds to your garden and keep them coming back.  Sugar-water dispensers designed to attract Hummingbirds are also available.

The larger the menu you offer, the more types of birds you will attract.  Try bread crumbs, dried fruit, suet, cracked corn and sunflower seeds.

Many birds will feed from an elevated tray, while some will feed only on the ground; for others, a seed encrusted ball of suet suspended from a tree is ideal.
 

Birds eat insects too

enticing birds to your garden with desirable fruit and seeds will help greatly in controlling insect populations, as most birds prefer a varied diet.  The importance of insect control by birds can hardly be over-rated.  robins may take 'garden friendly' earthworms , but also feasts on Ants. Beetles, Cankerworms, Caterpillars, Cutworms, Crickets, Flies (puppae and adults, slugs snails, Sowbufs, Spiders, Termites, Wireworms, and Weevils.  Wood Warblers are almost 100 per cent insect eaters.

In bringing birds to your garden, you add a new dimension of interest and will be regarded by their colour, movement and song.  the trees and shrubs will enhance your garden so your benefit again.