Follow by Email

Sunday, April 19, 2015

These bird invaders are crowding out our natural birds.


Eurasian Collared Dove
Several non-native bird species have moved into North America, most recently the Eurasian Collared Dove. This bird, originally native to the Indian sub-continent spread following an accidental release in the Bahamas in the mid-70s. These non-native species (due mainly to the lack of natural enemies) will out-compete our native bird species. Recent invaders likely to be seen in north Texas are the Monk Parakeet and the Nutmeg Mannikin. Actually, the House Sparrow (really a Weaver Finch), the Starling, the Rock Dove and the eastern population of the House Finch are “invaders” too – having been brought here against their will in the past.


Not hard to figure out what kind of bird it is.  
Yellow-headed Blackbird
Several times I’ve been asked to I.D. a bird. The query goes something like ”the average-size bird is black, but it has a yellow head”. I instantly know it’s a Yellow-headed Blackbird. They’re traveling through here now, having spent the winter in Mexico or the deep, deep south of Texas. Some will stay here all summer, but the majority will continue north. The male only is black and yellow – the female is all brown. YHBBs prefer wetlands and open, freshly-cultivated fields. That’s where their main food source is (insects). They eat seed sometimes, if insects aren’t handy. They feed and travel in mixed flocks, mainly with the slightly smaller Red-winged Blackbirds.
An interesting phenomena is that YHBBs and other migratory birds are arriving about 5 days earlier than historical data indicate.  What that means is to look sooner for the many warblers and such that will be moving through north Texas.


OWEN YOST, in addition to being a blogger, is a licensed Landscape Architect emeritus who has lived and worked in north Texas for over 30 years. He is the recipient of a Lifetime Achievement Award of the Native Plant Society of Texas, and is a member of the American Society of Landscape Architects (ASLA), International Federation of Landscape Architects, National Wildlife Federation and the Audubon Society. His office is at in Denton




No comments:

Post a Comment