Found inside – Page 210In its spring breeding plumage , the spotted sandpiper has a vividly spotted breast . ... Females are more aggressive and active during courtship than males ... Found inside – Page 195Consider the case of the spotted sandpiper . ... Female sandpipers mate with several males because they rarely produce more than four eggs in a clutch ... Found inside – Page 416Females , which are 25 percent larger than males , defend large nesting ... of the Spotted Sandpiper , both monogamous and polyandrous females share ... Found inside – Page 123Spotted Sandpiper Actitis macularia Spotted Sandpiper is polyandrous ( one female mating with more than one male ) , moving between nesting territories and ... Found inside – Page 113For example, female spotted sandpipers lay clutches of eggs that are then cared for by various males. With males making the greater parental investment, female spotted sandpipers compete aggressively for access to several males. Found inside – Page 178Spotted sandpiper. temperature of an individual snapping turtle egg during ... Spotted sandpipers differ from most birds in that the male and female roles ... Found inside – Page 226In spring , the female Spotted Sandpiper usually arrives first to fight other females for territory . When the males arrive , she'll often mate with one ... Found inside – Page 278In spotted sandpipers (Actitis macularia) and jacanas (Fig. 9.13) a female competes to defend a large territory in which she may have several males ... Found inside – Page 242Spotted Sandpiper . Peet - weet . PLATE CCCX . Male and Female . Bill a little longer than the head , very slender , flexible , greenish above , yellow ... Found insideMen's status might change over time—for instance, a woman married to a head man ... Male spotted sandpipers, however, sometimes foil these attempts at mate ... Found inside – Page 317In several species , including the Spotted Sandpiper and phalaropes , females are larger than males , brighter in coloration , and more aggressive . Found inside – Page 69C. FEMALE SEXUAL SELECTION AND THE EVOLUTION OF POLY ANDRY Male incubation ... Spotted Sandpipers and Northern Jacanas exemplify resource-defense polyandry, ... Found inside – Page 163Female spotted sandpipers average about 50 g, while males weigh in at a relatively paltry 41 g. Females arrive earlier in the breeding ... Females can compete for mates and resources, resulting in differential reproductive success, and thus, experience sexual selection pressures. Found inside – Page 331LX . , that at their meeting on February 15th , 1899 , “ Mr. F. Curtis exhibited a specimen of the Spotted Sandpiper , which had been shot on the 2nd of February , at Finnea , co . Longford , by Mr. ... Adult winter , male and female . — The bronze ... Found inside – Page 173In spotted sandpipers the female is an honorary male: larger, more aggressive, and showier than the other party. As Darwin noted, in most birds males arrive ... Found inside – Page 197Breeding Biology: Male and female spotted sandpipers arrive on their breeding ... especially among females, which are larger and more aggressive than males. Found inside – Page 87In the Spotted Sandpiper, both females and especially males incubate occasionally during the egg-laying period; males incubate on average about 14% of the ... Found inside – Page 58But Spotted Sandpipers don't read textbooks. In their world the female displays for the male, initiates breeding, and defends the territory, allowing the ... Found inside – Page 350Scolopax Gallinago . Common Snipe . Male . 9 . Female . 10 . Gallinula . Jack Snipe . 11. ... 24 . macularia , Spotted Sandpiper . 25 . hypoleucos . Found inside – Page 98Take the spotted sandpiper for instance. Ornithologist Lewis Oring has witnessed female sandpipers puncture another female's eye or break her leg. Male ... Found inside – Page 83An aggressive female The spotted sandpiper is a polyandrous species . The female mates with several males and defends her territory from invading females . Found insideBreaking with the usual pattern of avian breeding behavior, the female spotted sandpiper arrives before the male at the breeding grounds, stakes out its ... Found inside – Page 106In biology, females are defined as the sex that produces larger sex cells (eggs), ... Female spotted sandpipers also have darker spots than males; ... Found inside – Page 27Female precedes male in return to breeding territory (protogyny). Polyandrous species, for example, Spotted Sandpiper (Actitis macularia) (Oring and Lank ... Found inside – Page 131... found in birds — polyandry (one female mating with more than one male). Unlike most sandpipers, the Spotted has invaded temperate areas to breed. Found inside – Page 152between the quality of a female's territory and the number of males that she acquires (Maxson and Oring, 1980), but in both spotted sandpipers and American ... Found inside – Page 80An aggressive female The spotted sandpiper is a polyandrous species. The female mates with several males and defends herterritory from invading females. Found inside – Page 243Female spotted sandpipers sometimes assist their final mates in ... but females take a smaller share in incubation than males ( Maxson and Oring , 1980 ) . Found inside – Page 90Spotted Sandpiper Skins in the University of Michigan Museum of Zoology 71174 96685 96686 95952 96400 96401 98508 37054 37061 95953 Male Male Male Female Female CHAPTER 9 , Plumages The natal down is well developed. Found inside – Page 75Females seeking EPCs have assessed the males with whom they are copulating. ... Spotted sandpipers (Actitis macularia) are ground-nesting birds that breed ... Found inside – Page 20This bird is a widespread shorebird in which the female is larger than the male and is territorial. The female spotted sandpiper may lay separate clutches ... Found inside – Page 227Spotted Sandpiper In Spotted Sandpipers sex roles are reversed. Females are polyandrous and establish breeding territories, and males hold territories ... Found inside – Page 181Contrary to the usual pattern among birds, females arrive before males on the breeding ... Spotted sandpipers differ from most other birds (Greenwood 1980; ... Found insideIn spring, the female spotted sandpiper usually arrives first to fight other females for territory. When the males arrive, she'll often mate with one, ... Found inside – Page 52Buff - breasted Sandpiper male in single - wing displa In Spotted Sandpipers ( and several other ... The females have larger and blacker spots than males . Found inside – Page 289Lekking shorebirds fit well into Gowaty's hypothesis since males do not ... For instance, in the polyandrous spotted sandpiper female reproductive success ... Found inside – Page 32They are also the Did You Know ? sandpiper you are • The female Spotted ... streams . more aggressive than Spotted Sandpipers are the male . usually ... Found inside – Page 142The eggs are buffy with heavy spotting of dark brown. ... Breeding Biology: Male and female spotted sandpipers arrive on their breeding grounds at about the ... This is the first book devoted to these two ubiquitous species. It takes the reader from the exciting breeding activities in the temperate north through their long migration south and journey back. Found inside – Page 74other females for territories and defend them from each other.5 When the males ... A male spotted sandpiper's evolved willingness to incubate eggs should be ... Found inside – Page 152The Spotted Sandpiper is one of the most familiar North American shorebirds. ... but, in at least one, the female lands near a male, spreads her tail, ... Found inside – Page 320Red Phalaropes in one year at Barrow, Alaska, had 1.44 males/females (n = 9) (Schamel ... Territories In contrast to jacanas and Spotted Sandpipers, female ... Found inside – Page 45Determining Sex Female Spotted Sandpipers are slightly larger than males and , in most cases , have more spotting . The first year females , however , are lightly spotted and indistinguishable from males ( Theodora Nelson , pers . commun . ) . Found inside – Page 103Faced with these difficulties female Spotted Sandpipers employ an interesting strategy — they act like males . Females arrive on the summer breeding grounds ... Found inside – Page 110Breeding biology: Male and female spotted sandpipers arrive on their breeding grounds at about the same time, and pairbonds are rapidly formed during a ... Found inside – Page 180Unlike many other shorebirds , female Spotted Sandpipers often arrive on the breeding grounds to establish territories 4-5 days prior to the males ( Oring ... Found inside – Page 127HOUSING AND MATE AVAILABILITY BELOW Spotted sandpiper males are always single parents because females mate with and lay eggs for multiple males in quick ... Found inside – Page 133Spotted Sandpipers (Actitis macularia) have a resource-defense polyandrous ... Females attract males in large part on the basis of the quality of their ... Found inside – Page 65Females often arrive early at the breeding grounds, setting up and defending ... The Spotted Sandpiper male has ten times more testosterone than the female ... Compete for mates and resources, resulting in differential reproductive success, and thus, experience sexual selection and EVOLUTION! Sandpiper may lay separate clutches... found inside – Page 98Take the Spotted has invaded areas. 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